https://bugs.winehq.org/show_bug.cgi?id=41398
--- Comment #23 from Johnny Robeson johnny@localmomentum.net --- a workaround presented on the battle.net appdb page is to
1. disable your internet connection (in whatever way is easiest for you) 2. start the editor 3. wait until login dialog shows up 4. turn connection back on 5. log in
It definitely worked for me. That might give folks a hint as to where something is going wrong.