In the last hour, first the Mag254 just wouldn't load the portal at all, like the server wasn't reponding. I rebooted a couple times with the same result. Now, about a hour later, it begins booting then throws the Authentication Problem error message. It appears they are having server issues.
In the past when server issues have happened, various mods made a slew of wrong guesses with peoples problems, only to finally find out later it was indeed a server problem. The mods, although they attempt to help, appear to be pretty much in the dark as much as anyone when it comes to first hand information on the server. TIne appears to be the exception.
I would set tight and be patient, not fool with the box for a while. The odds are pretty high that the problem will be resolved.