Its on your end blizzard, Fix it.
Did everything asked to do. No PC issues, the only game I have ever had issues with in my … 16 years of playing online is your game. Always messing about with my system, and other games.
Program and make systems worth the billion dollar company you are. I might have found a fix here, launching the game from the launcher, it seems the files are being copied but I am not paying to have issues like this.
Go through the menus just above the play button and check that all the versions of WoW are fully updated. It could be Classic. It, ironically, updates very frequently.
Once you’re sure they’re all updated, you should be able to repair them.
If you’re stuck in such a way that the game is broken and can’t be repaired or updated, then I guess kill the folder with fire and download the whole thing again… 
I tried all of that. In the end I had to download world of warcraft 3 times yesterday, and now it seems to be downloading another 68 GB
Uhhh… wow. Tried reinstalling Battle.Net?
You can make it find the existing installs so it doesn’t take too long.