Garrys mod help!

[JuJoker]

Hello,

I bought today Garrys Mod and tried to play it, I have installed CSS and CSGO, but when I try to join ANY server this game crash, without any errors... I dont know why! I want to play on a german RP Server and I also donwloaded their content packs etc. but its still dont work!

[Pyrolex]

#moved

[JuJoker]

Help!
I can play CSS and CSGO but not GMod!