Unable to log in either. I keep checking the Xbox.com/status and there is one red flag meaning that not all Xbox live services are working. This appears to be some kind if system wide ESO server or Xbox live server problem, not something attributed to the latest game patch. I wonder if this is a denial of service type attack.
well its definately eso's servers which are the issue.
All i can say is keep trying to login.
you will get past the error eventually, and get to character selection.