Same thing here, playing on PC, first time playing the game and trying to create an account. Got so frustrated I just went to Larian's website and created an account there-- it works perfectly fine on their own site, and you can log in and out there with no issue. Can even link your Steam account.
But even after doing that, STILL can't log in when starting the game. It cycles for a bit and then goes right back to the login screen. No error message or anything.
