It's generally easier if you just paste the screenshot in your post instead of offering it as a download. This is the issue:

This sounds more like a firewall issue than a server-side issue. 

Have you checked all the requirements listed here in the System requirements? And then specifically the Firewall section. Also check out your VPN / proxy if you're using any.

Firewall or Proxy setting proper steps followed by you can you send those steps or other solution we can follow.It will be great help.