Mod works with run button, but not in the normal launcher.

I made a mod, but when I try to run it in the launcher it doesn't work. It only works on MCreator. This happened shortly after updating to 2025.3. When I sent the mod to someone they said that the crash reports had something to do with the noise generation mixin. I don't really know how those work and it could be that but I don't know how to get rid of it.