Why can't I go to sign in page to Gitlab.com from Browser?

I went to about.gitlab.com. from there I clicked on sign in. The browser keeps showing: "Checking your browser before accessing gitlab.com.". This has been going on for 10 hours. I have Already tried clearing my cookies and restarting my pc. This did not yield any result. My firewall is turned off so it isn't a firewall issue.