Not much. The main topic on this issue is in the Desktop App Tech Support forum:
There was a post by Blizzard on 3 Dec 2023 acknowledging the issue; no further updates since then. There’s a few players who were able to sort it out… and who have provided some info on what they did to solve it; perhaps that can help you ?
This forum here is for feedback on the Support system… the forums, the KnowledgeBase, ease of navigation… etc