Why Log in Pending?

I use USACO Guide with Safari and Chrome.
Safari is not logged in. But Chrome is logged in.
But their user data is different.
So I tried to log in to the Safari.
But it’s still loading.
It seems not gonna stop.
What should I do?

You know in some countries there are some rules that stops users to use even educational websites and that makes problems like yours, so you can easily use VPN.