"Error: Module not found"

Attempting to install and run according to the instructions at https://github.com/cracker0dks/whiteboard#without-docker on Ubuntu 18.04.

$ node -v
v12.18.0

Complete error dump running npm ci && npm run start:prod:

WARNING in ./node_modules/pdfjs-dist/webpack.js
Module not found: Error: Can't resolve 'worker-loader' in '/var/www/html/whiteboard/node_modules/pdfjs-dist'
 @ ./node_modules/pdfjs-dist/webpack.js
 @ ./src/js/main.js
 @ ./src/js/index.js
 @ multi ./src/js/index.js

ERROR in ./node_modules/pdfjs-dist/webpack.js
Module not found: Error: Can't resolve 'worker-loader' in '/var/www/html/whiteboard/node_modules/pdfjs-dist'
 @ ./node_modules/pdfjs-dist/webpack.js 27:18-64
 @ ./src/js/main.js
 @ ./src/js/index.js
 @ multi ./src/js/index.js
Child HtmlWebpackCompiler:
     1 asset
    Entrypoint HtmlWebpackPlugin_0 = __child-HtmlWebpackPlugin_0
    [0] ./node_modules/html-webpack-plugin/lib/loader.js!./src/index.html 11.5 KiB {0} [built]
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! whiteboard@1.0.0 build: `webpack --config config/webpack.build.js`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the whiteboard@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/user1/.npm/_logs/2020-07-01T16_54_06_763Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! whiteboard@1.0.0 start:prod: `npm run build && node scripts/server.js --mode=production`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the whiteboard@1.0.0 start:prod script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/user1/.npm/_logs/2020-07-01T16_54_06_805Z-debug.log

[yrammos]

@cracker0dks @FloChehab problem was due to irrelevant local misconfiguration, apologies for the false alarm. Closing.

[cracker0dks]

no problem. Glad you found it 👍