Nodejs 4 appears to introduce an UNABLE_TO_GET_ISSUER_CERT_LOCALLY error for users behind a company firewall.

Npm install & other commands no longer work after update from Nodejs 0.12 to Nodejs 4 or 5. After discussion on the npm forums, current thought is that this may be an issue in Node rather than Npm.

See npm/npm#9580.
Also
npm/npm#10125
npm/npm#9906

This issue is preventing our team from upgrading to Nodejs 4 or 5. Any suggestions welcome.

Thanks