I did everything that was posted regarding issue of this initilzating stuck while updating the game and it is becoming more nightmare for me as I have to deal with it like every patch update.
Is there a solid solution for it. I tried to restart, delete cache, delete indices, close everything via task manager, pretty much everything but still not working.
It sometime fetches the files like 101 mb / 101 mb but then go back up update-play-update-play-update-play stuck and it keeps saying ‘waiting on another installation or update’.
Edit: I finally solved it my repeatedly log off and on from my wifi. Apparently although I have internet, it is a connection issue to the Blizzard servers, maybe related to my internet company.
I wasted 50 mins repairing it for it not to work and turns out the World of Warcraft voice proxy was the problem , the whole time. Closed it , it updated without a problem seconds after closing the task.