Thats the error. NPM cannot connect to internet. This happens if npm doesn’t know about the possible http/https proxy settings.
See instructions here; node.js - Is there a way to make npm install (the command) to work behind proxy? - Stack Overflow
And the value you should use instead of http://proxy_host:port should be provided to you by your IT admin.
If there’s no proxy available, in order to make that work, change networks to something that allows internet access.