I try to open gmod in sandboxie, then I just get a black screen for like 2 seconds, then it just goes back to the screen I was in.

Any suggestions or tips?

EDIT: ive been opening steam sandboxed, on another account that owns gmod, i can open it fine without sandboxie, but it doesnt work in it

I try to open gmod in sandboxie, then I just get a black screen for like 2 seconds, then it just goes back to the screen I was in. Any suggestions or tips? EDIT: ive been opening steam sandboxed, on another account that owns gmod, i can open it fine without sandboxie, but it doesnt work in it