The Gold Road Chapter – which includes the Scribing system – and Update 42 is now available to test on the PTS! You can read the latest patch notes here: https://forums.elderscrollsonline.com/en/discussion/656454/
The issue is resolved, and the North American PC/Mac megaserver is now available. Thank you for your patience!
https://forums.elderscrollsonline.com/en/discussion/comment/8100050/#Comment_8100050
https://forums.elderscrollsonline.com/en/discussion/comment/8100050/#Comment_8100050
