i’ve had to use the battlenet launcher in order to play without entering an authentication code: i posted my issue at this topic in the Technical Support forum:
When I try to login manually after directly opening wow.exe (not through the battle.net application) it asks for an authenticator code, then gives me the WOW51900314 error code. I’ve tried resyncing as well as removing+readding my authenticator. Doing stuff on the website that requires me to input a code (such as when I readded the authenticator) works fines. As does things that just do the one touch authenticator (such as first logging into the app, or website) also works fine. Logging in after…