org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException: Critical injection failure: @Inject annotation on init could not find any targets matching 'loadLevel' in net/minecraft/server/MinecraftServer. Using refmap perlaobrazy-refmap.json [INJECT_PREPARE Applicator Phase -> mixins.perlaobrazy.json:ExampleMixin from mod perlaobrazy -> Prepare Injections -> handler$bid004$perlaobrazy$init(Lorg/spongepowered/asm/mixin/injection/callback/CallbackInfo;)V -> Parse -> -> Validate Targets]
at org.spongepowered.asm.mixin.injection.selectors.TargetSelectors.validate(TargetSelectors.java:346)
at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.readAnnotation(InjectionInfo.java:369)
at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.(InjectionInfo.java:340)
at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.(InjectionInfo.java:331)
at org.spongepowered.asm.mixin.injection.struct.CallbackInjectionInfo.(CallbackInjectionInfo.java:48)
at jdk.internal.reflect.GeneratedConstructorAccessor62.newInstance(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Unknown Source)
at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.spongepowered.asm.mixin.injection.struct.InjectionInfo$InjectorEntry.create(InjectionInfo.java:196)
at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.parse(InjectionInfo.java:664)
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.prepareInjections(MixinTargetContext.java:1399)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.prepareInjections(MixinApplicatorStandard.java:731)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:315)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:246)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:437)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:418)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
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:119)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(Unknown Source)
at java.base/java.security.SecureClassLoader.defineClass(Unknown Source)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.defineClassFwd(KnotClassLoader.java:160)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:355)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at java.base/java.lang.Class.getDeclaredFields0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.base/java.lang.Class.getDeclaredFields(Unknown Source)
at knot//net.optifine.reflect.FieldLocatorTypes.(FieldLocatorTypes.java:25)
at knot//net.optifine.reflect.Reflector.(Reflector.java:503)
at knot//net.minecraft.class_128.method_568(class_128.java:175)
at knot//net.minecraft.class_128.method_24305(class_128.java:345)
at knot//net.minecraft.client.main.Main.method_44604(Main.java:159)
at knot//net.minecraft.client.main.Main.main$mixinextras$wrapped$9(Main.java:51)
at knot//net.minecraft.client.main.Main.mixinextras$bridge$main$mixinextras$wrapped$9$10(Main.java)
at knot//net.minecraft.client.main.Main.wrapMethod$zjl000$feather$sdTsr(Main.java:517)
at knot//net.minecraft.client.main.Main.main(Main.java)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at net.digitalingot.rustextension.ProxiedStart.main(ProxiedStart.java:16)

Minecraft Launcher?
Fabric Loader version?
Mods AND their versions?

Minecraft Launcher? Fabric Loader version? Mods AND their versions?

I use feather client and I only have my mod and I don't know why it doesn't work

Minecraft Launcher? Fabric Loader version? Mods AND their versions?

I use feather client and I only have my mod and I don't know why it doesn't work

"my mod"? Which mod is that? Also still need to know which version of Fabric Loader that you are using as well.