Maintenance for the week of March 16:
• PC/Mac: No maintenance – March 16
• ESO Store and Account System for maintenance – March 18, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
Error 201 is an erroneous error that always occurs on patch days. Close out the launcher repeatedly until you get the Play Option. That's all I ever need to do for it.