I got this error and i can't figure out what is wrong, can someone maybe help whats going on?

[23:01:46] [main/INFO]:Found mod file kfflang-4.11.0.jar of type LANGPROVIDER with provider net.minecraftforge.fml.loading.moddiscovery.JarInJarDependencyLocator@107f4980

[23:01:46] [main/INFO]:Found mod file Ponder-Forge-1.20.1-1.0.36.jar of type MOD with provider net.minecraftforge.fml.loading.moddiscovery.JarInJarDependencyLocator@107f4980

[23:01:46] [main/INFO]:Found mod file MixinExtras-0.5.0-beta.5.jar of type GAMELIBRARY with provider net.minecraftforge.fml.loading.moddiscovery.JarInJarDependencyLocator@107f4980

[23:01:46] [main/INFO]:Found mod file Registrate-MC1.20-1.3.11.jar of type GAMELIBRARY with provider net.minecraftforge.fml.loading.moddiscovery.JarInJarDependencyLocator@107f4980

[23:01:46] [main/INFO]:Found mod file spectrelib-forge-0.13.15+1.20.1.jar of type MOD with provider net.minecraftforge.fml.loading.moddiscovery.JarInJarDependencyLocator@107f4980

[23:01:48] [main/INFO]:Compatibility level set to JAVA_17

[23:01:48] [main/INFO]:Launching target ‘forgeclient’ with arguments [–version, forge-47.3.0, --gameDir, C:\Users\rkacz\curseforge\minecraft\Instances\Kri Ejt, --assetsDir, C:\Users\rkacz\curseforge\minecraft\Install\assets, --uuid, 0fb4c72e55fe41178e09cd566c8c588b, --username, H2S_Official6, --assetIndex, 5, --accessToken, ???, --clientId, ODg4YWMxOTgtYWY1MS00NDhiLWEyNmUtMzg5ZDNjYmI0Mzg3, --xuid, 2535470177615824, --userType, msa, --versionType, release, --width, 1024, --height, 768]

[23:01:48] [main/WARN]:Reference map ‘createdeco-forge-refmap.json’ for createdeco.mixins.json could not be read. If this is a development environment you can ignore this message

[23:01:48] [main/WARN]:Reference map ‘tfmg.refmap.json’ for design_decor.mixins.json could not be read. If this is a development environment you can ignore this message

[23:01:48] [main/WARN]:Reference map ‘tfmg.refmap.json’ for tfmg.mixins.json could not be read. If this is a development environment you can ignore this message

[23:01:48] [main/WARN]:Reference map ‘createframed.refmap.json’ for createframed.mixins.json could not be read. If this is a development environment you can ignore this message

[23:01:48] [main/WARN]:Reference map ‘createmoredrillheads.refmap.json’ for createmoredrillheads.mixins.json could not be read. If this is a development environment you can ignore this message

[23:01:48] [main/WARN]:Error loading class: com/simibubi/create/foundation/config/ui/SubMenuConfigScreen (java.lang.ClassNotFoundException: com.simibubi.create.foundation.config.ui.SubMenuConfigScreen)

[23:01:48] [main/WARN]:@Mixin target com.simibubi.create.foundation.config.ui.SubMenuConfigScreen was not found copycats-forge.mixins.json:featuretoggle.SubMenuConfigScreenMixin

If u see something could you let me know? Im new here so if im doing something wrong, Tell me pls

Mind sharing your whole log. Ideally via pastebin and send the link here

okay lemme do it

like this…? [23:01:46] [main/INFO]:Found mod file kfflang-4.11.0.jar of type LANGPROVIDER wi - Pastebin.com

Pastebin is good. But the log isnt. That one provides less details then your original post

What should i do then? Like i copied the same one but this time all of it

I need at least the error/exception. The error you originally posted just states that there was a error reading a mixin file, but normally it doesnt just cut off there. This makes me think there is more to the error

But if not then the issue stems from copycat-forge.mixins.json. if the mod isnt clear to who owns that file you can use a program something like mixin detector and get it to tell you

I do know that mod i think, and also there was no error suprisingly, only the “warn” texts, which is kinda weird to me since i did many modpacks and always there were errors. Or not.
Either way there were errors and warns, or it was all good.
Imma try tomorrow and if the mod wasn’t the problem, i’ll tell u