Maintenance for the week of May 25:
• PC/Mac: No maintenance – May 25
• ESO Store and Account System for maintenance – May 27, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
Same happend to me a year ago, I sent a ticket in game and they fixed it in like 3 days saying they did some adjustments in my account. I couldnt use bank, guildtraders or access guildbank and bid on traders with my guild.