Hello all,

This error occurred to me when trying to install npm modules with npm install. I tried with Yarn but the error was similar:

error Couldn't find package "..." on the "npm" registry.

The solution was into the .npmrc file.

I was using wrong credentials. I had to set the always-auth parameter to false.

To make it work on Yarn I also needed to remove the _auth parameter.

Have a good day!