Q:

(webpack)/buildin/module.js Module build failed: Error: ENOENT: no such file or directory,

In an attempt to resolve another issue, which is still unresolved (see here), I attempted to add webpack 4.15.x to my code. Instead of the desired result, it immediately broke my code and gave me this error (webpack)/buildin/module.js Module build failed: Error: ENOENT: no such file or directory and (webpack)/hot/emitter.js
Module build failed: Error: ENOENT: no such file or directory. Actually, there was another similar error that was resolved when I uninstalled and reinstalled the node packages. Otherwise, I have no clue how to proceed. Please advise. Thank you in advance. 

A:

As mentioned in the comments:
Try deleting /node_modules and package-lock.json then run 

npm install
npm run build
npm start

