Hey all,
This is a bug on Bliz’s side that occasionally pops up that Bliz needs to fix on their end. For this current occurrence, Bliz is aware and is looking into it. You can follow this thread if any updates are made.
Note: Bliz is aware that the fix attempt mentioned earlier in the linked thread below didn’t work.
It’s been out of development for 3 years. There’s no dedicated team to maintain it anymore. When issues pop up, resources are pulled from other places to bandaid them as best as possible.