I believe my work proxy is preventing me from being able to add themes and packages to Atom. From the preferences menu, I get:
Fetching featured packages and themes fai
I am working behind a proxy server and spent about half a day on this issue, setting https_proxy as well as http_proxy didn't make a difference.
What did it for me was setting the proxy from the cmd line like so:
apm config set proxy http://myproxyaddress:port
I still can't install packages through Atom's gui, but doing it through the cmd line works fine. That I'll take.
I later realised I could've switched to the wifi and got it to work immediately...