This kind of problem has come up a few times today, I think it might have something to do with the Cloudflare thing being down in some areas still, Brazil and Australia I think are two of those areas. In this case there's nothing you can do but wait, since it's not something you yourself can fix. The staff is working on trying to fix it though, just hang in there.
I would try seeing if your firewall and/or antivirus program might be the cause, sometimes those two things will block FH from having internet access.