Jupyterlab fails to build

I Installed jupyterlab in a conda R environment. First I made sure that repr is installed:

(R) C:\Users\Johannes.Wiesner>conda list repr
# packages in environment at C:\Users\Johannes.Wiesner\Miniconda3\envs\R:
#
# Name                    Version                   Build  Channel
r-repr                    0.19.2            r36h6115d3f_0
r-reprex                  0.2.1             r36h6115d3f_0

Then I wanted to use the recommended installation method via pip but I ended up with issue #211 (I also installed node.js before that using conda install.

I then wanted to use jupyter labextension install @lckr/jupyterlab_variableinspector but this gives me this error:

(R) C:\Users\Johannes.Wiesner>jupyter labextension install @lckr/jupyterlab_variableinspector
Building jupyterlab assets (production, minimized)
An error occurred.
RuntimeError: JupyterLab failed to build
See the log file for details:  C:\Users\JOHANN~1.WIE\AppData\Local\Temp\jupyterlab-debug-_jo0ubmr.log

Technical details:

• Windows 10
• jupyterlab 3.2.8 using Miniconda

Here’s the full log file:

Node v17.4.0

Yarn configuration loaded.
> C:\Users\Johannes.Wiesner\Miniconda3\envs\R\npm.CMD pack @lckr/jupyterlab_variableinspector
npm notice 
npm notice package: @lckr/jupyterlab_variableinspector@3.0.9
npm notice === Tarball Contents === 
npm notice 1.5kB LICENSE        
npm notice 4.0kB README.md      
npm notice 2.6kB package.json   
npm notice 0B    style/base.css 
npm notice 1.3kB style/index.css
npm notice 21B   style/index.js 
npm notice === Tarball Details === 
npm notice name:          @lckr/jupyterlab_variableinspector          
npm notice version:       3.0.9                                       
npm notice filename:      @lckr/jupyterlab_variableinspector-3.0.9.tgz
npm notice package size:  3.9 kB                                      
npm notice unpacked size: 9.5 kB                                      
npm notice shasum:        1c922fa2fd13c5ab0fe365f1a5bad69869887811    
npm notice integrity:     sha512-o0kx+iDORrxaN[...]6qvwpD8dLit3w==    
npm notice total files:   6                                           
npm notice 
lckr-jupyterlab_variableinspector-3.0.9.tgz

Fetching URL: https://registry.yarnpkg.com/@lckr%2Fjupyterlab_variableinspector
> C:\Users\Johannes.Wiesner\Miniconda3\envs\R\npm.CMD pack @lckr/jupyterlab_variableinspector@3.0.9
npm notice 
npm notice package: @lckr/jupyterlab_variableinspector@3.0.9
npm notice === Tarball Contents === 
npm notice 1.5kB LICENSE        
npm notice 4.0kB README.md      
npm notice 2.6kB package.json   
npm notice 0B    style/base.css 
npm notice 1.3kB style/index.css
npm notice 21B   style/index.js 
npm notice === Tarball Details === 
npm notice name:          @lckr/jupyterlab_variableinspector          
npm notice version:       3.0.9                                       
npm notice filename:      @lckr/jupyterlab_variableinspector-3.0.9.tgz
npm notice package size:  3.9 kB                                      
npm notice unpacked size: 9.5 kB                                      
npm notice shasum:        1c922fa2fd13c5ab0fe365f1a5bad69869887811    
npm notice integrity:     sha512-o0kx+iDORrxaN[...]6qvwpD8dLit3w==    
npm notice total files:   6                                           
npm notice 
lckr-jupyterlab_variableinspector-3.0.9.tgz

Node v17.4.0

Yarn configuration loaded.
Building jupyterlab assets (production, minimized)
> node C:\Users\Johannes.Wiesner\Miniconda3\envs\R\lib\site-packages\jupyterlab\staging\yarn.js install --non-interactive
yarn install v1.21.1
[1/5] Validating package.json...
[2/5] Resolving packages...
success Already up-to-date.
Done in 0.50s.

> node C:\Users\Johannes.Wiesner\Miniconda3\envs\R\lib\site-packages\jupyterlab\staging\yarn.js yarn-deduplicate -s fewer --fail
yarn run v1.21.1
$ C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\.bin\yarn-deduplicate -s fewer --fail
Done in 0.44s.

> node C:\Users\Johannes.Wiesner\Miniconda3\envs\R\lib\site-packages\jupyterlab\staging\yarn.js run build:prod:minimize
yarn run v1.21.1
$ webpack --config webpack.prod.minimize.config.js
assets by status 10.6 MiB [cached] 122 assets
orphan modules 5.04 MiB [orphan] 1284 modules
runtime modules 108 KiB 14 modules
built modules 14.1 MiB (javascript) 4.63 KiB (consume-shared) 4.59 KiB (share-init) [built]
  modules by path ./node_modules/ 14.1 MiB
    javascript modules 14 MiB 1043 modules
    json modules 33.2 KiB 6 modules
  consume-shared-module modules 4.63 KiB
    modules by path consume shared module (default) @jupyterlab/ 3.65 KiB 42 modules
    modules by path consume shared module (default) @lumino/ 588 bytes 14 modules
  provide-module modules 4.59 KiB 112 modules
  modules by path ./build/ 23.8 KiB
    ./build/bootstrap.js 3.86 KiB [built] [code generated]
    ./build/index.out.js + 1 modules 19.9 KiB [built] [code generated]

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/application-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/application. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/apputils-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/apputils. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/attachments. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/cells. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/celltags-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/celltags. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/codeeditor. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/codemirror-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/codemirror. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/completer-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/completer. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/console-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/console. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/coreutils. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/csvviewer-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/csvviewer. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/debugger-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/debugger. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/docmanager-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/docmanager. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/docprovider-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/docprovider. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/docregistry. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/documentsearch-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/documentsearch. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/extensionmanager-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/extensionmanager. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/filebrowser-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/filebrowser. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/fileeditor-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/fileeditor. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/help-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/htmlviewer-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/htmlviewer. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/hub-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/imageviewer-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/imageviewer. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/inspector-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/inspector. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/javascript-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/json-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/launcher-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/launcher. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/logconsole-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/logconsole. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/mainmenu-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/mainmenu. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/markdownviewer-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/markdownviewer. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/mathjax2-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/mathjax2. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/nbformat. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/notebook-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/notebook. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/observables. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/outputarea. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/pdf-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/property-inspector. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/rendermime-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/rendermime-interfaces. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/rendermime. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/running-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/running. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/services. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/settingeditor-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/settingeditor. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/settingregistry. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/shared-models. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/shortcuts-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/statedb. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/statusbar-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/statusbar. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/terminal-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/terminal. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/theme-dark-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/theme-light-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/toc-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/toc. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/tooltip-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/tooltip. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/translation-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/translation. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/ui-components-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/ui-components. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/vdom-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/vdom. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @jupyterlab/vega5-extension. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for vega-lite. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for @lumino/keyboard. Use the licenseTextOverrides option to add the license text if desired.

WARNING in license-webpack-plugin: could not find any license file for gud. Use the licenseTextOverrides option to add the license text if desired.

ERROR in resolving fallback for shared module @lckr/jupyterlab_variableinspector
Module not found: Error: Can't resolve '@lckr/jupyterlab_variableinspector' in 'C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\build'
resolve '@lckr/jupyterlab_variableinspector' in 'C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\build'
  Parsed request is a module
  using description file: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\build\package.json (relative path: .)
    Field 'browser' doesn't contain a valid alias configuration
    resolve as module
      C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\build\node_modules doesn't exist or is not a directory
      looking for modules in C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules
        single file module
          using description file: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\package.json (relative path: ./node_modules/@lckr/jupyterlab_variableinspector)
            no extension
              Field 'browser' doesn't contain a valid alias configuration
              C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector is not a file
            .js
              Field 'browser' doesn't contain a valid alias configuration
              C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.js doesn't exist
            .json
              Field 'browser' doesn't contain a valid alias configuration
              C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.json doesn't exist
            .wasm
              Field 'browser' doesn't contain a valid alias configuration
              C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.wasm doesn't exist
        existing directory C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector
          using description file: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: .)
            using description file: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\package.json (relative path: ./node_modules/@lckr/jupyterlab_variableinspector)
              no extension
                Field 'browser' doesn't contain a valid alias configuration
                C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector is not a file
              .js
                Field 'browser' doesn't contain a valid alias configuration
                C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.js doesn't exist
              .json
                Field 'browser' doesn't contain a valid alias configuration
                C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.json doesn't exist
              .wasm
                Field 'browser' doesn't contain a valid alias configuration
                C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector.wasm doesn't exist
              as directory
                existing directory C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector
                  using description file: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: .)
                    use ./lib/index.js from main in package.json
                      using description file: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: ./lib/index.js)
                        no extension
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js doesn't exist
                        .js
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js.js doesn't exist
                        .json
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js.json doesn't exist
                        .wasm
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js.wasm doesn't exist
                        as directory
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\lib\index.js doesn't exist
                    using path: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index
                      using description file: C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\package.json (relative path: ./index)
                        no extension
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index doesn't exist
                        .js
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index.js doesn't exist
                        .json
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index.json doesn't exist
                        .wasm
                          Field 'browser' doesn't contain a valid alias configuration
                          C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\staging\node_modules\@lckr\jupyterlab_variableinspector\index.wasm doesn't exist
      C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\lab\node_modules doesn't exist or is not a directory
      C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\jupyter\node_modules doesn't exist or is not a directory
      C:\Users\Johannes.Wiesner\Miniconda3\envs\R\share\node_modules doesn't exist or is not a directory
      looking for modules in C:\Users\Johannes.Wiesner\Miniconda3\envs\R\node_modules
        single file module
          No description file found in C:\Users\Johannes.Wiesner\Miniconda3\envs\R\node_modules\@lckr or above
          no extension
            Field 'browser' doesn't contain a valid alias configuration
            C:\Users\Johannes.Wiesner\Miniconda3\envs\R\node_modules\@lckr\jupyterlab_variableinspector doesn't exist
          .js
            Field 'browser' doesn't contain a valid alias configuration
            C:\Users\Johannes.Wiesner\Miniconda3\envs\R\node_modules\@lckr\jupyterlab_variableinspector.js doesn't exist
          .json
            Field 'browser' doesn't contain a valid alias configuration
            C:\Users\Johannes.Wiesner\Miniconda3\envs\R\node_modules\@lckr\jupyterlab_variableinspector.json doesn't exist
          .wasm
            Field 'browser' doesn't contain a valid alias configuration
            C:\Users\Johannes.Wiesner\Miniconda3\envs\R\node_modules\@lckr\jupyterlab_variableinspector.wasm doesn't exist
        C:\Users\Johannes.Wiesner\Miniconda3\envs\R\node_modules\@lckr\jupyterlab_variableinspector doesn't exist
      C:\Users\Johannes.Wiesner\Miniconda3\envs\node_modules doesn't exist or is not a directory
      C:\Users\Johannes.Wiesner\Miniconda3\node_modules doesn't exist or is not a directory
      C:\Users\Johannes.Wiesner\node_modules doesn't exist or is not a directory
      C:\Users\node_modules doesn't exist or is not a directory
      C:\node_modules doesn't exist or is not a directory

webpack 5.44.0 compiled with 1 error and 92 warnings in 30024 ms

asset index.css 15.8 KiB [compared for emit] (name: index)
asset index.js 0 bytes [compared for emit] [minimized] (name: index)
Entrypoint index 15.8 KiB = index.css 15.8 KiB index.js 0 bytes
./node_modules/@jupyterlab/theme-dark-extension/style/theme.css 50 bytes [built] [code generated]
css ./node_modules/css-loader/dist/cjs.js!./node_modules/@jupyterlab/theme-dark-extension/style/variables.css 15.3 KiB [code generated]
css ./node_modules/css-loader/dist/cjs.js!./node_modules/@jupyterlab/theme-dark-extension/style/theme.css 472 bytes [code generated]
webpack 5.44.0 compiled successfully in 2117 ms

asset index.css 14.7 KiB [compared for emit] (name: index)
asset index.js 0 bytes [compared for emit] [minimized] (name: index)
Entrypoint index 14.7 KiB = index.css 14.7 KiB index.js 0 bytes
./node_modules/@jupyterlab/theme-light-extension/style/theme.css 50 bytes [built] [code generated]
css ./node_modules/css-loader/dist/cjs.js!./node_modules/@jupyterlab/theme-light-extension/style/variables.css 14.3 KiB [code generated]
css ./node_modules/css-loader/dist/cjs.js!./node_modules/@jupyterlab/theme-light-extension/style/theme.css 472 bytes [code generated]
webpack 5.44.0 compiled successfully in 2043 ms
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

JupyterLab failed to build
Traceback (most recent call last):

  File "C:\Users\Johannes.Wiesner\Miniconda3\envs\R\lib\site-packages\jupyterlab\debuglog.py", line 48, in debug_logging
    yield

  File "C:\Users\Johannes.Wiesner\Miniconda3\envs\R\lib\site-packages\jupyterlab\labextensions.py", line 141, in start
    production = production, minimize = self.minimize, app_options=app_options)

  File "C:\Users\Johannes.Wiesner\Miniconda3\envs\R\lib\site-packages\jupyterlab\commands.py", line 483, in build
    production=production, minimize=minimize, clean_staging=clean_staging)

  File "C:\Users\Johannes.Wiesner\Miniconda3\envs\R\lib\site-packages\jupyterlab\commands.py", line 695, in build
    raise RuntimeError(msg)

RuntimeError: JupyterLab failed to build

Exiting application: lab

[giacomolanciano]

Had a similar issue when trying to install via jupyter labextension within a conda env on WSL (Ubuntu 18.04). I prefer to avoid using pip in a conda env, so I worked around that by installing this conda package instead:

https://github.com/conda-forge/jupyterlab-variableinspector-feedstock

Not a big fan of using a conda version of a package maintained by others than the package’s original author, but for now it works like a charm. Hope it helps in your case as well!

[JohannesWiesner]

Had a similar issue when trying to install via jupyter labextension within a conda env on WSL (Ubuntu 18.04). I prefer to avoid using pip in a conda env, so I worked around that by installing this conda package instead:

https://github.com/conda-forge/jupyterlab-variableinspector-feedstock

Not a big fan of using a conda version of a package maintained by others than the package’s original author, but for now it works like a charm. Hope it helps in your case as well!

The installation at least worked now, thanks for the hint! Unfortunately, I think I am stuck with a new issue now. I can open the variable inspector now (and I can see all the variables with proper attributes), but I cannot click on / inspect any of the variables. Could be related to #130 or #224