There is already a main thread that Bliz is monitoring and providing updates as they get them. There’s a series of steps and a log file they’d like you to send.
Try to keep this issue to one thread to help consolidate and track the issue.
[To anyone who arrives here, the main thread quoted above is only for Errors BLZBNTBGS000003F8, BLZBNTBGS80000011 & BLZ51901016]