''Failed to initialize audio'' Thread - Call of Warhammer: Beginning of The End Times mod for Medieval II: Total War: Kingdoms

I keep getting the above error when trying to play this mod or the original games, on steam. It starts, but no audio and stuck in window instead of full screen.

Any ideas on how to fix it?

Edited by: Mudhut

If you have the problem with the original games, then you probably need to do a "verify integrity of game cache" or reinstall. It's an issue with Medieval 2, Steam, or your computer.

Fixed, many thanks