Are you absolutely sure? Because right now, it's working absolutely fine for me. What I want you to do is make a new empty project with nothing but just those two plugins, Damage Core and Critical Control, and replicate it. If you can do that, upload that new empty project online (do not deploy it) and link it to me. I'll take a look. If you can't replicate it, that means you have another plugin conflicting with the critical calculation process.