Please link the github for the mod that does not work, if known!
https://github.com/fxmorin/carpet-fixes, im pretty sure of it ;)

Mod compatibility is a bit more complicated so depending on the issue, this report will be very different
[19:34:15] [main/WARN]: Method overwrite conflict for method_5800 in carpet-fixes.mixins.json:itemFixes.ItemEntity_lightningKillsDropsMixin from mod carpet-fixes, previously written by carpet.mixins.ItemEntityMixin. Skipping method.
[19:34:16] [main/ERROR]: Minecraft has crashed!
net.fabricmc.loader.impl.FormattedException: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_2442 failed
at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:472) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.15.11.jar:?]
Caused by: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_2442 failed
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119) ~[fabric-loader-0.15.11.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?]
at net.minecraft.class_2358.method_10199(class_2358.java:326) ~[client-intermediary.jar:?]
at net.minecraft.class_2966.method_12851(class_2966.java:54) ~[client-intermediary.jar:?]
at net.minecraft.client.main.Main.main(Main.java:166) ~[fabric-loader-0.15.11-1.20.1.jar:?]
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) ~[fabric-loader-0.15.11.jar:?]
... 2 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongep
owered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119) ~[fabric-loader-0.15.11.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?]
at net.minecraft.class_2358.method_10199(class_2358.java:326) ~[client-intermediary.jar:?]
at net.minecraft.class_2966.method_12851(class_2966.java:54) ~[client-intermediary.jar:?]
at net.minecraft.client.main.Main.main(Main.java:166) ~[fabric-loader-0.15.11-1.20.1.jar:?]
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) ~[fabric-loader-0.15.11.jar:?]
... 2 more
Caused by: org.spongepowered.asm.mixin.injection.throwables.InjectionError: Critical injection failure: Argument modifier method modifyUpdate(I)I in carpet-fixes.mixins.json:blockUpdates.duplicateUpdates.PoweredRailBlock_updateMixin from mod carpet-fixes failed injection check, (0/1) succeeded. Scanned 1 target(s). Using refmap carpet-fixes-refmap.json
at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.postInject(InjectionInfo.java:468) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.applyInjections(MixinTargetContext.java:1384) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transforme
r.MixinApplicatorStandard.applyInjections(MixinApplicatorStandard.java:1062) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:402) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:327) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:422) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:403) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218) ~[fabric-loader-0.15.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119) ~[fabric-loader-0.15.11.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?]
at net.minecraft.class_2358.method_10199(class_2358.java:326) ~[client-intermediary.jar:?]
at net.minecraft.class_2966.method_12851(class_2966.java:54) ~[client-intermediary.jar:?]
a
t net.minecraft.client.main.Main.main(Main.java:166) ~[fabric-loader-0.15.11-1.20.1.jar:?]
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) ~[fabric-loader-0.15.11.jar:?]
... 2 more