So I have my own custom pack which I occasionally do a batch update of mods for - recently did one for the new Thermal stuff, and I updates Chisel and a few others, now I have this crash: https://pastebin.com/jWwXyCVq

I've tried rolling back a few versions, but I can't remember which one I was running before!

Brilliant, thanks a lot for the quick reply.

This is a CTM problem, though really it's the fault of your resource pack (F32) shipping broken json files. Vanilla apparently ignores this, so we will have to as well. Ref Chisel-Team/ConnectedTexturesMod@5c57ebc