Whenever i try playing all i get is this Data/enGB/wow-update-enGB-18273.MPQ: World of Warcraft can’t make a required change to an archive file. Be sure you have write permission for the World of Warcraft folder or try running the game in administrator mode. For more information, see: https://battle.net/support/article/6910
Make sure you set your realmlist in config.wtf in the WTF folder correctly. There're many posts raising similar issues here, so try a search to find out other possible solutions.
Follow these steps:
1) Restart your PC ( this is important)
2) close your Torrent client and move your WoW folder away from your Torrent's download destination
3) now right click on WoW folder> Properties> remove "read-only".
this doesn't work i am running in the same error when trying to play MoP
when launching the game i was in the middle of game and was booted trying to log back in and this issue started