FAiled to apply patch

have an issue and its not good. I logged in my account and it started patching something. i waited and it said it gotta restart client. when i click restart it logs me off and gives me this error :

Failed to apply patch. Please try again later. If this problem persists you may need to reinstall or contact technical support.


Is there a fix for that?

Edit : It says that i should restart my client and after that the previous problem shows

just download the provided torrent and run wow.exe
Don't run the launcher or updater.

log-in by using warmane account name, not email address