Weird thing is I can use FCC login for the forum and chat, just not for main site. I suspect it would be something off with my user, since it’s quite an old account and I haven’t logged in for quite some time.
If you are unable to log in or keep getting “we cannot reach the server…” it may be that you have a duplicated account. To solve this issue you will need to write to support@freecodecamp.org.