ValueError: "@jupyter-widgets/jupyterlab-manager" is not a valid npm package

I am trying to run the following powershell command in Windows 10:

jupyter labextension install @jupyter-widgets/jupyterlab-manager

The ValueError in the subject-line is raised. Below are some relevant version numbers from my Anaconda installation:

• python 3.6.4 64-bit
• conda 4.3.34
• notebook 5.4.0
• ipywidgets 7.1.2
• jupyter 1.0.0
• jupyterlab 0.31.8
• npm 1.4.12
• nodejs 8.9.1

and here is the output after using the --debug option:

PS C:\Users\jeschwar> jupyter labextension install @jupyter-widgets/jupyterlab-manager --debug
> C:\Anaconda3_64bit\Scripts\npm.CMD pack @jupyter-widgets/jupyterlab-manager
npm ERR! addLocal Could not install jupyter-widgets/jupyterlab-manager
npm ERR! Error: ENOENT: no such file or directory, stat 'C:\Users\jeschwar\AppData\Local\Temp\tmpusxl33eq\jupyter-widgets\jupyterlab-manager'
npm ERR! If you need help, you may report this *entire* log,
npm ERR! including the npm and node versions, at:
npm ERR!     <http://github.com/npm/npm/issues>

npm ERR! System Windows_NT 10.0.10586
npm ERR! command "C:\\Anaconda3_64bit\\node.exe" "C:\\Anaconda3_64bit\\Library\\lib\\node_modules\\npm\\bin\\npm-cli.js" "pack" "@jupyter-widgets/jupyterlab-manager"
npm ERR! cwd C:\Users\jeschwar\AppData\Local\Temp\tmpusxl33eq
npm ERR! node -v v8.9.1
npm ERR! npm -v 1.4.12
npm ERR! path C:\Users\jeschwar\AppData\Local\Temp\tmpusxl33eq\jupyter-widgets\jupyterlab-manager
npm ERR! syscall stat
npm ERR! code ENOENT
npm ERR! errno -4058
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR!     C:\Users\jeschwar\AppData\Local\Temp\tmpusxl33eq\npm-debug.log
npm ERR! not ok code 0
Traceback (most recent call last):

  File "C:\Anaconda3_64bit\lib\site-packages\jupyterlab\labextensions.py", line 71, in start
    ans = self.run_task()

  File "C:\Anaconda3_64bit\lib\site-packages\jupyterlab\labextensions.py", line 100, in run_task
    for arg in self.extra_args

  File "C:\Anaconda3_64bit\lib\site-packages\jupyterlab\labextensions.py", line 100, in <listcomp>
    for arg in self.extra_args

  File "C:\Anaconda3_64bit\lib\site-packages\jupyterlab\commands.py", line 210, in install_extension
    return handler.install_extension(extension)

  File "C:\Anaconda3_64bit\lib\site-packages\jupyterlab\commands.py", line 347, in install_extension
    info = self._install_extension(extension, tempdir)

  File "C:\Anaconda3_64bit\lib\site-packages\jupyterlab\commands.py", line 1095, in _install_extension
    info = self._extract_package(extension, tempdir)

  File "C:\Anaconda3_64bit\lib\site-packages\jupyterlab\commands.py", line 1135, in _extract_package
    raise ValueError(msg % source)

ValueError: "@jupyter-widgets/jupyterlab-manager" is not a valid npm package


Errored, use --debug for full output:
ValueError: "@jupyter-widgets/jupyterlab-manager" is not a valid npm package

I realize the output says to create an issue in npm/npm but I thought I would start here because everything works fine when I tried this in Linux including the ipywidgets displaying correctly in JupyterLab.

Is this extension currently supported in Windows 10?

[jasongrout]

It looks like the relevant line is:

npm ERR! Error: ENOENT: no such file or directory, stat 'C:\Users\jeschwar\AppData\Local\Temp\tmpusxl33eq\jupyter-widgets\jupyterlab-manager'

Does that directory exist? Huh - why does it not have the @? Perhaps in windows things need to be quoted? I think @ may be a comment character?

Can you try jupyter labextension install "@jupyter-widgets/jupyterlab-manager"?

[choonsiong]

Face the same error message, and got it works using sudo:

(base) 00:20:15:69 ~ sudo jupyter labextension install @jupyter-widgets/jupyterlab-manager
Password:
Building jupyterlab assets (build:prod:minimize)
(base) 00:23:52:69 ~