“Chrome extension throws CRX file Error ”CRX_REQUIRD_PROOF_MISSING"

Question

I have Chrome extension and create the crx file using developer mode. I uploaded the crx file to some internal url (www.xyz.com/internal.crx).

Answer 1

In Chrome 75 it seems impossible to add an extension manually. Even if you manage to drag and drop it to chrome://extensions/page - chrome will block it from use.
The only way of distribution now seems to be only through the Chrome Web Store.
https://support.google.com/chrome_webstore/answer/2811969

Also see here: https://github.com/ahwayakchih/crx3#crx_required_proof_missing