When I try npm install new packages it shows me this error:
npm install
rollbackFailedOptional: verb npm-session 585aaecfe5f9a82
In my case I had to edit the .npmrc directly and add the proxy settings manually.
.npmrc
proxy=http://yourorganizationproxy.com:8080 https-proxy=http://yourorganizationproxy.com:8080
Hope this helps someone.