I looked at the code and saw it was related to recycling recipes, but as I don't have quality/space age mod enabled I figured I could just delete it, and that worked for me as a hotfix. so not really urgent for me, but after looking at the offending code, I tried it with only this mod and bzmods tin (as this is inside an if statement checking for bztin presence) it still occured, so minimal example is installing only that mod in addition to this