OK, got this after logging in for the second time after the patch. Did all the usual fixes, no dice. Then I did some deep digging and found a solution in the comments of this video:
https://youtube.com/watch?v=DcyDkyf5kqY
From the comments/description:
open -
C:\Users\*your user name*\Documents\Elder Scrolls Online\live
open the file "UserSettings.txt"
change this line:
SET AcceptedAddOnEULAVersion "5"
to this line:
SET AcceptedAddOnEULAVersion "-1"
This worked for me. Hope it helps.
Playing on PC/NA---UserID=Threemoons--usually on nights, weekends