[biohazerd87]

if you notice this error
Error:Failed to load dialog file Resource/UI/ClassMenu.res

Function trace:
CGameUI::Start
CGameUI::Initialize
CBaseUI::Start
CBaseUI::Initialize
Host_Init
CFileSystem_Steam::Mount()
it is trying to load a file "ClassMenu.res" which apparently doesn't exsist i don't know if this has a bearing on it but i hope it helps