Maintenance for the week of February 17:
• PC/Mac: No maintenance – February 17
• PC/Mac: NA and EU megaservers for maintenance – February 19, 4:00AM EST (9:00 UTC) - 12:00PM EST (17:00 UTC)
• Xbox: NA and EU megaservers for patch maintenance – February 19, 4:00AM EST (9:00 UTC) - 12:00PM EST (17:00 UTC)
• PlayStation®: NA and EU megaservers for patch maintenance – February 19, 4:00AM EST (9:00 UTC) - 12:00PM EST (17:00 UTC)
• ESO Store and Account System for maintenance – February 19, 4:00AM EST (9:00 UTC) - 12:00PM EST (17:00 UTC)
https://forums.elderscrollsonline.com/en/discussion/673215
Error 304 message on XBox
This problem is becoming quite frustrating. It started up again on Xbox One's North American Server at approximately 6:45pm PST.