Maintenance for the week of December 8:
• [COMPLETE] ESO Store and Account System for maintenance – December 10, 9:00AM EST (14:00 UTC) - 12:00PM EST (17:00 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.