Some overlay programs can cause Blizzard games to crash.
Troubleshooting errors when trying to sign in to our forums
Cannot remember Blizzard password and want to reset it.
Your account is unable to log into Blizzard services.
This error occurs when your connection to our servers is blocked. This may be caused by a third-party program.
Troubleshooting for BLZBNTBNA00000A8E (2403)
Troubleshooting for BLZBNTBNA00000A8E (2413)
What to do if you continue being redirected to the login screen after entering your credentials