I’ve seen a couple of unanswered posts with this error code: BLZBNTAGT000008A4
Most were related to corrupted files and simply deleting and reinstalling battle net fixed issue.
I’ve tried all the basic troubleshooting I’ve seen as well as some other thoughts from the internet and nothing has worked. I have a brand new desktop with basically nothing on it. I am starting from square 1 but nothing has fixed the issue.