Hey again everyone,
Just got word that the cause of this should be addressed. It does seem that it may not be a retroactive fix in that if there is bad files are remaining, they will need to be manually deleted. The idea is what was shared earlier.
Using file explorer, go to where the Battle.net application is installed. Typically thats: C:\Program Files (x86)\Battle.net
Look for any Battle.net.##### folders here. The ##### is probably going to be 13360 in this case. Just delete those folders and then restart the Battle.net application. A reinstall should not be needed.
I’ll keep this thread open for now to monitor if this persists for anyone. Thanks Boubou and everyone else for the updates and patience while this was sorted out.