I am getting an error in my pack suddenly, it was working fine until after I uploaded it to curseforge.

https://pastebin.com/gqgjdkry

That's because you are using the alpha version of pmmo, which is a complete rewrite. That version has NBT compat embedded, so you don't need the extra mod, but it's not feature-complete.

Roll pmmo back to a release version to fix your issue

thank you