Maintenance for the week of October 6:
• PC/Mac: No maintenance – October 6
• ESO Store and Account System for maintenance – October 7, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
Please see these two articles here and here for information on these errors. For Xbox in particular, I would recommend trying the steps in this article to see if they help with the connection to the server.