Usually this happens when someone tries to launch the game with only a .exe file and not the rest of the relevant files. Have you tried launching the game on your steam account from your library? Sounds like a build issue on the steam end of things.
Usually this happens when someone tries to launch the game with only a .exe file and not the rest of the relevant files. Have you tried launching the game on your steam account from your library? Sounds like a build issue on the steam end of things.