same here, was playing just fine, logged out for lunch. when i went to log back in, a screen from windows popped up saying I was about to install a certificate, I said ok, thought it was wierd. but now it says my login information is invalid?
Went back though all my previous troubleshooting steps, none of them fixed it.
someone else suggested removing the notation in host file, tried that, doesn't change anything. still login not accepted. The net7 window shows that it talks to the server fine, so don't think it has anything to do with that.