Have you any help?
If I click on Yes. Show this Error.
Did you grab the github files? If not make sure to go grab them, other wise i would suggest a validate of steam cache for the game. If that comes up with nothing then i recommend a full reinstall.
My thoughts exactly. Looks like thats what the problem is (missing github files). Reply further if it isn’t fixed and we will revist this with additional troubleshooting.