This account needs to be converted to a Battle.net account issue

Hi everyone, I'm new here, tried login with my account and it says so. Anyone know what's going on? Thanks.

Try to login with your account username and not the email you used for registration.

Same for me,tried with username but still same problem

Check your realmlist.

Warmane realmlist guide

worked after realmlist change. Mine was set to .ru