Maintenance for the week of August 3:
• PC/Mac: No maintenance – August 3
• ESO Store and Account System for maintenance – August 4, 5:00AM EDT (9:00 UTC) - 4:00PM EDT (20:00 UTC)
Please see this article for information on Error 307. If this error has continued to persist since the time of your post, then please open up a support ticket with us and we would be happy to investigate this for you.