The PTS is now offline for the patch 10.0.0 maintenance and is currently unavailable.

https://forums.elderscrollsonline.com/en/discussion/656543/temporarily-taking-down-the-pts-the-pc-na-live-server

The issue is resolved, and the North American PC/Mac megaserver is now available. Thank you for your patience!

Maintenance for the week of April 15:
• [IN PROGRESS] ESO Store and Account System for maintenance – April 16, 8:00AM EDT (12:00 UTC) - 12:00PM EDT (16:00 UTC)