GLW_StartOpenGL() - could not load OpenGL subsystem

game lags and when trying to change settings i get error GLW_StartOpenGL() - could not load OpenGL subsystem

Same as RtCW
https://steamcommunity.com/sharedfiles/filedetails/?id=256261724

update your video-card driver

Don't use the game in large resolution. Max is 1280x1024 without playing with some settings and stuff.