Maintenance for the week of July 6:
• PC/Mac: No maintenance – July 6
• ESO Store and Account System for maintenance – July 8, 10:00AM EDT (14:00 UTC) - 12:00PM EDT (16:00 UTC)
If you keep trying eventually it will work. Just leave the game for a few hours and try again later. The game/servers and just bugged, many people have been experiencing the same thing for the last few weeks.