[1.16.5]How to solve Exception in thread "main" ?

[user9934]

I am new to java. I am trying to make a modpack and I am getting this error.

 

Uncaught exception in thread "main"
java.lang.RuntimeException: Mixin transformation of net.minecraft.client.main.Main failed
    at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:419)
    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:145)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:454)
    at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
    at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [curios.mixins.json:PlayerManagerMixin from mod curios] from phase [DEFAULT] in config [curios.mixins.json] FAILED during PREPARE
    at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:638)
    at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinPrepareError(MixinProcessor.java:585)
    at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:543)
    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:414)
    ... 7 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: The specified mixin 'top.theillusivec4.curios.mixin.PlayerManagerMixin' was not found
    at org.spongepowered.asm.mixin.transformer.MixinInfo.<init>(MixinInfo.java:865)
    at org.spongepowered.asm.mixin.transformer.MixinConfig.prepareMixins(MixinConfig.java:852)
    at org.spongepowered.asm.mixin.transformer.MixinConfig.prepare(MixinConfig.java:777)
    at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:540)
    ... 13 more
Caused by: java.lang.ClassNotFoundException: The specified mixin 'top.theillusivec4.curios.mixin.PlayerManagerMixin' was not found
    at org.spongepowered.asm.mixin.transformer.MixinInfo.loadMixinClass(MixinInfo.java:1314)
    at org.spongepowered.asm.mixin.transformer.MixinInfo.<init>(MixinInfo.java:858)
    ... 16 more
 

Edited August 30, 2022 by user9934

[perromercenary00]

if you text the curios.mixins.json file on https://jsonchecker.com/ 
it pass or not 

[user9934]

I did not understand, explain me please

[perromercenary00]

based on the log i think theres an error on curios.mixins.json file  

[user9934]

Thanks a lot