Thanks for the report, KalLaba! I’d assume if that helped, a New Admin account and clearing the Battle.net Cache and Tools on the New Admin account may help as well.
We do not recommend to clear registry files or registry cleaners as this may cause issues with the operating system. This hasn’t been successful so far from our reports on troubleshooting. If the New admin and clearing the files helps, please do let us know! If not, please do reach out to our Technical Support team.
We are looking at these situations on a case to case notice as there’s been a few several different causes and issues so far. If we have a solid resolution that is consistent, I’ll update them here.