I normally log into the game by using running it directly, entering my email/pass and then my auth code - if it prompts.
But now it’s asking for my auth code and comes up with an error saying I’ve been disconnected (WOW51900314).
I know my details are right, because I can log into to the Battle.net launcher without any problem (using the email/pass + auth) and then start the game fine. I also have another account that works fine, but I always log in using launcher for that one.
edit: looks like it’s been reported and confirmed an issue
Same for me … I can’t log in via the app directly anymore either. Have to go through the battlenet launcher. Perhaps it has something to do with MS purchasing WoW?