Unable to validate game version help please

I am having the “unable to validate game version” issue. Yes i did read the FAQ, I tried the different solutions, no it did not change the fact that the game is not willing to start. I was playing an hour before this probleme occured, everything was fine, i played the entire day without any problem, so if you can come up with a solution that will prevent me from quitting this server and going back to wotlk classic, i would love it.

Thank you for your answers.

Other than the FAQ suggestions, this can also be related to OS updates or outdated drivers. Try updating those. Also try rebooting your device, it’s wonders what a quick restart can do.