When I try to load my optifine with optifabric, it says this:
java.lang.IllegalArgumentException
at org.objectweb.asm.ClassReader.(ClassReader.java:262)
at org.objectweb.asm.ClassReader.(ClassReader.java:180)
at org.objectweb.asm.ClassReader.(ClassReader.java:166)
at org.objectweb.asm.ClassReader.(ClassReader.java:287)
at me.modmuss50.optifabric.util.ASMUtils.readClass(ASMUtils.java:27)
at me.modmuss50.optifabric.mod.OptifineSetup$1.apply(OptifineSetup.java:147)
at me.modmuss50.optifabric.util.ZipUtils.transform(ZipUtils.java:165)
at me.modmuss50.optifabric.util.ZipUtils.transform(ZipUtils.java:129)
at me.modmuss50.optifabric.mod.OptifineSetup.getRuntime(OptifineSetup.java:133)
at me.modmuss50.optifabric.mod.OptifabricSetup.run(OptifabricSetup.java:46)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at com.chocohead.mm.Plugin.getMixins(Plugin.java:340)
at org.spongepowered.asm.mixin.transformer.PluginHandle.getMixins(PluginHandle.java:128)
at org.spongepowered.asm.mixin.transformer.MixinConfig.postInitialise(MixinConfig.java:796)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:568)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:462)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:438)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:290)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:112)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:467)
at net.fabricmc.loader.impl.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50)
at net.fabricmc.loader.impl.entrypoint.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:117)
at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:47)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke(EntrypointUtils.java:35)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:162)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
could someone help me plz?

I suspect something is wrong (maybe corrupt) with your optifine archive. How about re-download it? If not resolved, Please add the steps you did, including what version of optifine you used.

What this comment says, you can also try running the Optifine Jar, then clicking extract, and moving it to the minecraft folder for your instance, that has fixed it in the past.

I suspect something is wrong (maybe corrupt) with your optifine archive. How about re-download it? If not resolved, Please add the steps you did, including what version of optifine you used.