I literally just installed this mod with a fresh minecraft game and the perfect forge version. The only mods I have on are optifine and of course this one and I get this. I am using multimc however I don't see why that should be an issue

EDIT- I even tried this on the normal minecraft launcher with no other mods installed and a fresh install of 1.12.2 forge latest version and even on the recommended version. It straight up just isn't working at all even when downgrading one version of the mod

EDIT- I'm an idiot and don't know how to read everything before making a conclusion.