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)
Please see this article if this error message has persisted for you!
Thank you, @ZOS_Adrikoth. I discovered that it's something on my end. My ISP changed the terms of my internet plan and instituted a data cap yesterday. I'm livid.