Is there a way to fix this without verifying the game files?
It just disappeared for no reasonWhy is it missing? Have you moved it somewhere else or deleted it?
I don't think so.Has a firewall blocked it??
I have had this exact same issue with AC. Tried lots of things but it turned out that Avast anti-virus was the problem. Unistall Avast completely (I downloaded Malwarebytes as an alterative) and run the AC file verify in Steam. That will then reinstall the missing ACS file. Load up in Content Manager, you will get the same error screen. Click OK and it will open.Is there a way to fix this without verifying the game files?