itch.io

I downloaded this mod earlier and it seems to mostly be working but now when I go to the co-op mode, it says there is an error with steam. "Steamworks extension could not load. Did you copy all the needed files to the Nuclear Throne' directory?" I'm not sure what this means or how to fix it. I think I downloaded everything properly and it lets me play solo fine and I think I can set up local servers, but I can't figure out how to get steam to work. My friends downloaded this too and don't seem to be getting the steam issue, I'm not sure what I did differently.