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Network protocal error minecraft

Anonymous
2025-06-16T15:35:26+00:00

i already tried restarting my router and pc, idk what to do it just stopped letting me join servers one day for no reason
---- Minecraft Network Protocol Error Report ----

// Sabotage!

Time: 2025-06-15 12:28:34

Description: Packet handling error

java.lang.RuntimeException: Mixin transformation of net.minecraft.class_743 failed

at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427)

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 knot//net.minecraft.class\_8674.method\_52794(class\_8674.java:119)

at knot//net.minecraft.class\_8733.method\_53041(class\_8733.java:22)

at knot//net.minecraft.class\_8733.method\_65081(class\_8733.java:8)

at knot//net.minecraft.class\_2600.method\_11072(class\_2600.java:27)

at knot//net.minecraft.class\_1255.method\_18859(class\_1255.java:164)

at knot//net.minecraft.class\_4093.method\_18859(class\_4093.java:23)

at knot//net.minecraft.class\_1255.method\_16075(class\_1255.java:138)

at knot//net.minecraft.class\_1255.method\_5383(class\_1255.java:123)

at knot//net.minecraft.class\_310.method\_1523(class\_310.java:1296)

at knot//net.minecraft.class\_310.method\_1514(class\_310.java:922)

at knot//net.minecraft.client.main.Main.main(Main.java:267)

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.impl.launch.knot.KnotClient.main(KnotClient.java:23)

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)

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)

... 18 more

Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [blues-togglesneak.client.mixins.json:KeyboardInputMixin from mod blues-togglesneak] from phase [DEFAULT] in config [blues-togglesneak.client.mixins.json] FAILED during APPLY

at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:638)

at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinApplyError(MixinProcessor.java:589)

at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:379)

... 21 more

Caused by: org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException: Critical injection failure: @Inject annotation on tick could not find any targets matching 'Lnet/minecraft/class_743;method_3129(ZF)V' in net/minecraft/class_743. Using refmap client-blues-togglesneak-refmap.json [INJECT_PREPARE Applicator Phase -> blues-togglesneak.client.mixins.json:KeyboardInputMixin from mod blues-togglesneak -> Prepare Injections -> handler$zbn000$blues-togglesneak$tick(ZFLorg/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 java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.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)

... 21 more

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --

Thread: Render thread

Stacktrace:

at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427)

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)

-- Incoming Packet --

Details:

Type: clientbound/minecraft:finish\_configuration

Is Terminal: true

Is Skippable: false

Stacktrace:

at knot//net.minecraft.class\_2600.method\_59803(class\_2600.java:56)

at knot//net.minecraft.class\_8673.method\_60882(class\_8673.java:131)

at knot//net.minecraft.class\_8673.method\_59807(class\_8673.java:110)

at knot//net.minecraft.class\_2600.method\_11072(class\_2600.java:32)

at knot//net.minecraft.class\_1255.method\_18859(class\_1255.java:164)

at knot//net.minecraft.class\_4093.method\_18859(class\_4093.java:23)

at knot//net.minecraft.class\_1255.method\_16075(class\_1255.java:138)

at knot//net.minecraft.class\_1255.method\_5383(class\_1255.java:123)

at knot//net.minecraft.class\_310.method\_1523(class\_310.java:1296)

at knot//net.minecraft.class\_310.method\_1514(class\_310.java:922)

at knot//net.minecraft.client.main.Main.main(Main.java:267)

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.impl.launch.knot.KnotClient.main(KnotClient.java:23)

-- Connection --

Details:

Protocol: configuration

Flow: CLIENTBOUND

Is Local: false

Server type: OTHER

Server brand: Paper (Velocity)

-- System Details --

Details:

Minecraft Version: 1.21.4

Minecraft Version ID: 1.21.4

Operating System: Windows 11 (amd64) version 10.0

Java Version: 21.0.6, Azul Systems, Inc.

Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Azul Systems, Inc.

Memory: 584969312 bytes (557 MiB) / 1398800384 bytes (1334 MiB) up to 2147483648 bytes (2048 MiB)

CPUs: 12

Processor Vendor: AuthenticAMD

Processor Name: AMD Ryzen 5 7600X 6-Core Processor             

Identifier: AuthenticAMD Family 25 Model 97 Stepping 2

Microarchitecture: Zen 3

Frequency (GHz): 4.70

Number of physical packages: 1

Number of physical CPUs: 6

Number of logical CPUs: 12

Graphics card #0 name: NVIDIA GeForce RTX 4070 SUPER

Graphics card #0 vendor: NVIDIA

Graphics card #0 VRAM (MiB): 12282.00

Graphics card #0 deviceId: VideoController1

Graphics card #0 versionInfo: 32.0.15.7283

Graphics card #1 name: AMD Radeon(TM) Graphics

Graphics card #1 vendor: Advanced Micro Devices, Inc.

Graphics card #1 VRAM (MiB): 512.00

Graphics card #1 deviceId: VideoController2

Graphics card #1 versionInfo: 32.0.12033.1030

Memory slot #0 capacity (MiB): 16384.00

Memory slot #0 clockSpeed (GHz): 4.80

Memory slot #0 type: DDR5

Memory slot #1 capacity (MiB): 16384.00

Memory slot #1 clockSpeed (GHz): 4.80

Memory slot #1 type: DDR5

Virtual memory max (MiB): 130241.08

Virtual memory used (MiB): 35859.57

Swap memory total (MiB): 98304.00

Swap memory used (MiB): 58.58

Space in storage for jna.tmpdir (MiB): available: 1303122.38, total: 1906967.00

Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 1303122.38, total: 1906967.00

Space in storage for io.netty.native.workdir (MiB): available: 1303122.38, total: 1906967.00

Space in storage for java.io.tmpdir (MiB): available: 1303122.38, total: 1906967.00

Space in storage for workdir (MiB): available: 1303122.38, total: 1906967.00

JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance\_javaw.exe\_minecraft.exe.heapdump -Xmx2048M

Fabric Mods: 

	advanced-mouse-sensitivity: Advanced Mouse Sensitivity 1.0.1

	advancementplaques: Advancement Plaques 1.6.9

	appleskin: AppleSkin 3.0.6+mc1.21.3

	armor\_hud: Armor Hud 2.7-1.21.4

	armortrimitemfix: Armor Trim Item Fix 2.1.0

	badoptimizations: BadOptimizations 2.2.2

	blues-togglesneak: Blue's ToggleSneak 1.0.0

	c2me: Concurrent Chunk Management Engine 0.3.1.3.0+1.21.4

		c2me-base: Concurrent Chunk Management Engine (Base) 0.3.1.3.0+1.21.4

		c2me-client-uncapvd: Concurrent Chunk Management Engine (Client/Uncap View Distance) 0.3.1.3.0+1.21.4

		c2me-fixes-chunkio-threading-issues: Concurrent Chunk Management Engine (Fixes/Chunk IO/Threading Issues) 0.3.1.3.0+1.21.4

		c2me-fixes-general-threading-issues: Concurrent Chunk Management Engine (Fixes/General/Threading Issues) 0.3.1.3.0+1.21.4

		c2me-fixes-worldgen-threading-issues: Concurrent Chunk Management Engine (Fixes/WorldGen/Threading Issues) 0.3.1.3.0+1.21.4

		c2me-fixes-worldgen-vanilla-bugs: Concurrent Chunk Management Engine (Fixes/WorldGen/Vanilla Bugs) 0.3.1.3.0+1.21.4

		c2me-notickvd: Concurrent Chunk Management Engine (No Tick View Distance) 0.3.1.3.0+1.21.4

		c2me-opts-allocs: Concurrent Chunk Management Engine (Optimizations/Memory Allocations) 0.3.1.3.0+1.21.4

		c2me-opts-chunkio: Concurrent Chunk Management Engine (Optimizations/Chunk IO) 0.3.1.3.0+1.21.4

		c2me-opts-dfc: Concurrent Chunk Management Engine (Optimizations/Density Function Compiler) 0.3.1.3.0+1.21.4

		c2me-opts-math: Concurrent Chunk Management Engine (Optimizations/Math) 0.3.1.3.0+1.21.4

		c2me-opts-scheduling: Concurrent Chunk Management Engine (Optimizations/Scheduling) 0.3.1.3.0+1.21.4

		c2me-opts-worldgen-general: Concurrent Chunk Management Engine (Optimizations/General WorldGen) 0.3.1.3.0+1.21.4

		c2me-opts-worldgen-vanilla: Concurrent Chunk Management Engine (Optimizations/Vanilla WorldGen) 0.3.1.3.0+1.21.4

		c2me-rewrites-chunk-serializer: Concurrent Chunk Management Engine (Rewrites/Chunk Serializer) 0.3.1.3.0+1.21.4

		c2me-rewrites-chunk-system: Concurrent Chunk Management Engine (Rewrites/Chunk System) 0.3.1.3.0+1.21.4

		c2me-rewrites-chunkio: Concurrent Chunk Management Engine (Rewrites/Chunk IO) 0.3.1.3.0+1.21.4

		c2me-server-utils: Concurrent Chunk Management Engine (Server Utils) 0.3.1.3.0+1.21.4

		c2me-threading-lighting: Concurrent Chunk Management Engine (Threading/Lighting) 0.3.1.3.0+1.21.4

		com\_ibm\_async\_asyncutil: asyncutil 0.1.0

		io\_reactivex\_rxjava3\_rxjava: rxjava 3.1.8

		net\_objecthunter\_exp4j: exp4j 0.4.8

		org\_jctools\_jctools-core: jctools-core 4.0.5

		org\_reactivestreams\_reactive-streams: reactive-streams 1.0.4

	carpet: Carpet Mod 1.4.161+v241203

	chat\_heads: Chat Heads 0.13.18

	cloth-config: Cloth Config v17 17.0.144

		cloth-basic-math: cloth-basic-math 0.6.1

	collective: Collective 8.3

	completedshieldfix: Walksy's Complete Shield Fixes 1.4.0

	continuity: Continuity 3.0.0+1.21.4

	controlling: Controlling 22.0.5

	custom-crosshair-mod: Custom Crosshair Mod ${version}

	easyanvils: Easy Anvils 21.4.1

	easymagic: Easy Magic 21.4.1

	easyshulkerboxes: Easy Shulker Boxes 21.4.2

		iteminteractions: Item Interactions 21.4.2

	elementa: Elementa 708

	entity\_model\_features: Entity Model Features 2.4.1

	entity\_sound\_features: Entity Sound Features 0.6

	entity\_texture\_features: Entity Texture Features 6.2.10

		org\_apache\_httpcomponents\_httpmime: httpmime 4.5.10

	entityculling: EntityCulling 1.7.4

	essential: Essential 1.3.8.1

	essential-container: essential-container 1.0.0

		essential-loader: essential-loader 1.2.4

	euphoria\_patcher: Euphoria Patcher 1.6.4-r5.5.1-fabric

	fabric-api: Fabric API 0.119.2+1.21.4

		fabric-api-base: Fabric API Base 0.4.54+b47eab6b04

		fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.86+b1caf1e904

		fabric-biome-api-v1: Fabric Biome API (v1) 15.0.6+b1c29d8e04

		fabric-block-api-v1: Fabric Block API (v1) 1.0.31+7feeb73304

		fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.20+9c49cc8c04

		fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 2.0.8+7feeb73304

		fabric-client-tags-api-v1: Fabric Client Tags 1.1.29+20ea1e2304

		fabric-command-api-v1: Fabric Command API (v1) 1.2.62+f71b366f04

		fabric-command-api-v2: Fabric Command API (v2) 2.2.41+e496eb1504

		fabric-commands-v0: Fabric Commands (v0) 0.2.79+df3654b304

		fabric-content-registries-v0: Fabric Content Registries (v0) 9.1.19+25d1a67604

		fabric-convention-tags-v1: Fabric Convention Tags 2.1.20+7f945d5b04

		fabric-convention-tags-v2: Fabric Convention Tags (v2) 2.14.1+1edcd29104

		fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.3.6+7feeb73304

		fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.6.2+e99da0f704

		fabric-data-generation-api-v1: Fabric Data Generation API (v1) 22.3.1+0f4e5f5504

		fabric-dimensions-v1: Fabric Dimensions API (v1) 4.0.10+7feeb73304

		fabric-entity-events-v1: Fabric Entity Events (v1) 2.0.15+62245bef04

		fabric-events-interaction-v0: Fabric Events Interaction (v0) 4.0.4+a4eebcf004

		fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.63+7d48d43904

		fabric-item-api-v1: Fabric Item API (v1) 11.3.0+ee91fa1f04

		fabric-item-group-api-v1: Fabric Item Group API (v1) 4.2.2+fcb9601404

		fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.57+7d48d43904

		fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.55+df3654b304

		fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.5.4+bf2a60eb04

		fabric-loot-api-v2: Fabric Loot API (v2) 3.0.38+3f89f5a504

		fabric-loot-api-v3: Fabric Loot API (v3) 1.0.26+203e6b2304

		fabric-message-api-v1: Fabric Message API (v1) 6.0.25+7feeb73304

		fabric-model-loading-api-v1: Fabric Model Loading API (v1) 4.3.0+ae23723504

		fabric-networking-api-v1: Fabric Networking API (v1) 4.4.0+db5e668204

		fabric-object-builder-api-v1: Fabric Object Builder API (v1) 18.0.14+38b0d59804

		fabric-particles-v1: Fabric Particles (v1) 4.0.14+7feeb73304

		fabric-recipe-api-v1: Fabric Recipe API (v1) 8.1.1+640e77ae04

		fabric-registry-sync-v0: Fabric Registry Sync (v0) 6.1.11+4a9c1ece04

		fabric-renderer-api-v1: Fabric Renderer API (v1) 5.0.3+50f0feb204

		fabric-renderer-indigo: Fabric Renderer - Indigo 2.0.3+50f0feb204

		fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.58+73761d2e04

		fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.1.19+7feeb73304

		fabric-rendering-v1: Fabric Rendering (v1) 10.2.1+0d31b09f04

		fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 5.0.13+203e6b2304

		fabric-resource-loader-v0: Fabric Resource Loader (v0) 3.1.1+360374ac04

		fabric-screen-api-v1: Fabric Screen API (v1) 2.0.38+7feeb73304

		fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.118+7feeb73304

		fabric-sound-api-v1: Fabric Sound API (v1) 1.0.32+7feeb73304

		fabric-tag-api-v1: Fabric Tag API (v1) 1.0.7+7d48d43904

		fabric-transfer-api-v1: Fabric Transfer API (v1) 5.4.9+efa825c904

		fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 6.3.2+56e78b9b04

	fabric-language-kotlin: Fabric Language Kotlin 1.13.3+kotlin.2.1.21

		org\_jetbrains\_kotlin\_kotlin-reflect: kotlin-reflect 2.1.21

		org\_jetbrains\_kotlin\_kotlin-stdlib: kotlin-stdlib 2.1.21

		org\_jetbrains\_kotlin\_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 2.1.21

		org\_jetbrains\_kotlin\_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 2.1.21

		org\_jetbrains\_kotlinx\_atomicfu-jvm: atomicfu-jvm 0.27.0

		org\_jetbrains\_kotlinx\_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.10.2

		org\_jetbrains\_kotlinx\_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.10.2

		org\_jetbrains\_kotlinx\_kotlinx-datetime-jvm: kotlinx-datetime-jvm 0.6.2

		org\_jetbrains\_kotlinx\_kotlinx-io-bytestring-jvm: kotlinx-io-bytestring-jvm 0.7.0

		org\_jetbrains\_kotlinx\_kotlinx-io-core-jvm: kotlinx-io-core-jvm 0.7.0

		org\_jetbrains\_kotlinx\_kotlinx-serialization-cbor-jvm: kotlinx-serialization-cbor-jvm 1.8.1

		org\_jetbrains\_kotlinx\_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.8.1

		org\_jetbrains\_kotlinx\_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.8.1

	fabricloader: Fabric Loader 0.16.13

		mixinextras: MixinExtras 0.4.1

	ferritecore: FerriteCore 7.1.1

	forgeconfigapiport: Forge Config API Port 21.4.1

		com\_electronwill\_night-config\_core: core 3.8.1

		com\_electronwill\_night-config\_toml: toml 3.8.1

	freelook: Freelook 1.2.5

	fullscreenfix: Borderless Fullscreen 2.2.1

	fzzy\_config: Fzzy Config 0.7.0+1.21.3

		blue\_endless\_jankson: jankson 1.2.3

		fabric-permissions-api-v0: fabric-permissions-api 0.3.3

		net\_peanuuutz\_tomlkt\_tomlkt-jvm: tomlkt-jvm 0.3.7

	gammautils: Gamma Utils 2.2.5

	geckolib: GeckoLib 4 4.8.5

	hitboxplus: HitBox+ 0.2.4

	iceberg: Iceberg 1.2.13

	immediatelyfast: ImmediatelyFast 1.8.0+1.21.4

	java: OpenJDK 64-Bit Server VM 21

	lambdynlights: LambDynamicLights 4.1.3+1.21.4

		lambdynlights\_api: LambDynamicLights (API) 4.1.3+1.21.4

			yumi-commons-collections: Yumi Commons: Collections 1.0.0-alpha.12

			yumi-commons-core: Yumi Commons: Core 1.0.0-alpha.12

			yumi-commons-event: Yumi Commons: Event 1.0.0-alpha.12

		pride: Pride Lib 1.3.0+1.21.2

		spruceui: SpruceUI 6.2.2+1.21.4

	lithium: Lithium 0.15.3+mc1.21.4

	minecraft: Minecraft 1.21.4

	modernfix: ModernFix 5.20.3+mc1.21.4

	moreculling: More Culling 1.2.10

		conditional-mixin: conditional mixin 0.6.3

		mixinsquared: MixinSquared 0.2.0

	mousetweaks: Mouse Tweaks 2.27

	mr\_armor\_standarms: Armor Stand Arms 1-v.2.5.1

	mr\_dungeons\_andtaverns: Dungeons and Taverns 1-v4.6.3

	namepain: Name Pain 1.5.3

	nochatreports: No Chat Reports 1.21.4-v2.11.0

	noisium: Noisium 2.5.0+mc1.21.4

	notenoughanimations: NotEnoughAnimations 1.9.3

	org\_jetbrains\_annotations: annotations 13.0

	owo: oωo 0.12.20+1.21.4

		io\_wispforest\_endec: endec 0.1.9

		io\_wispforest\_endec\_gson: gson 0.1.6

		io\_wispforest\_endec\_jankson: jankson 0.1.6

		io\_wispforest\_endec\_netty: netty 0.1.5

	particlerain: Particle Rain 3.3.3

	particular: Particular 1.1.1+1.21.4

	pickupnotifier: Pick Up Notifier 21.4.0

	puzzleslib: Puzzles Lib 21.4.13

	scalablelux: ScalableLux 0.1.2+beta.1+fabric.6d46f24

	searchables: Searchables 1.0.3

	shieldstatus: Shield Status 1.21.4

	shulkerboxtooltip: Shulker Box Tooltip 5.2.6+1.21.4

	skinlayers3d: 3d-Skin-Layers 1.7.5

	sodium: Sodium 0.6.13+mc1.21.4

	sound\_physics\_remastered: Sound Physics Remastered 1.21.4-1.4.12

	subtle\_effects: Subtle Effects 1.9.4-hotfix.1

	threadtweak: ThreadTweak 0.1.7+mc1.21.5

	universalcraft: UniversalCraft 406

	viafabricplus: ViaFabricPlus 4.0.5-BACKPORT

		com\_github\_oryxel\_cubeconverter: CubeConverter 916cadb12a

		com\_google\_code\_findbugs\_jsr305: jsr305 3.0.2

		com\_vdurmont\_semver4j: semver4j 3.1.0

		com\_viaversion\_viaaprilfools-common: viaaprilfools-common 4.0.2-20250426.140810-22

		com\_viaversion\_viabackwards-common: viabackwards-common 5.3.3-20250426.185209-1

		com\_viaversion\_vialoader: vialoader 4.0.3-20250426.141011-6

		com\_viaversion\_viaversion-common: viaversion-common 5.3.3-20250426.143637-8

		de\_florianmichael\_classic4j: Classic4J 2.1.1-SNAPSHOT

		io\_jsonwebtoken\_jjwt-api: jjwt-api 0.12.6

		io\_jsonwebtoken\_jjwt-gson: jjwt-gson 0.12.6

		io\_jsonwebtoken\_jjwt-impl: jjwt-impl 0.12.6

		io\_netty\_netty-codec-http: netty-codec-http 4.2.0

		net\_jodah\_expiringmap: expiringmap 0.5.10

		net\_lenni0451\_commons\_httpclient: httpclient 1.6.0

		net\_lenni0451\_mcstructs-bedrock\_forms: forms 2.0.0

		net\_lenni0451\_mcstructs-bedrock\_text: text 2.0.0

		net\_lenni0451\_reflect: Reflect 1.4.0

		net\_raphimc\_minecraftauth: MinecraftAuth 4.1.1

		net\_raphimc\_viabedrock: ViaBedrock 0.0.16-20250404.165607-5

		net\_raphimc\_vialegacy: ViaLegacy 3.0.10-20250426.140714-8

		org\_cloudburstmc\_netty\_netty-transport-raknet: netty-transport-raknet 1.0.0.CR3-SNAPSHOT

		org\_lz4\_lz4-pure-java: lz4-pure-java 1.8.0

		team\_unnamed\_mocha: mocha 3.0.1

		viafabricplus-api: ViaFabricPlus API 4.0.5-BACKPORT

		viafabricplus-api-legacy: ViaFabricPlus API Legacy 4.0.5-BACKPORT

		viafabricplus-visuals: ViaFabricPlus Visuals 4.0.5-BACKPORT

	vigilance: Vigilance 306

	vmp: Very Many Players 0.2.0+beta.7.192+1.21.4

	voicechat: Simple Voice Chat 1.21.4-2.5.30

	xaeroworldmap: Xaero's World Map 1.39.9

	yet\_another\_config\_lib\_v3: YetAnotherConfigLib 3.6.6+1.21.4-fabric

		com\_twelvemonkeys\_common\_common-image: common-image 3.12.0

		com\_twelvemonkeys\_common\_common-io: common-io 3.12.0

		com\_twelvemonkeys\_common\_common-lang: common-lang 3.12.0

		com\_twelvemonkeys\_imageio\_imageio-core: imageio-core 3.12.0

		com\_twelvemonkeys\_imageio\_imageio-metadata: imageio-metadata 3.12.0

		com\_twelvemonkeys\_imageio\_imageio-webp: imageio-webp 3.12.0

		org\_quiltmc\_parsers\_gson: gson 0.2.1

		org\_quiltmc\_parsers\_json: json 0.2.1

	zoomify: Zoomify 2.14.2+1.21.3

		com\_akuleshov7\_ktoml-core-jvm: ktoml-core-jvm 0.5.2
Windows for home | Windows 11 | Internet and connectivity

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  1. Anonymous
    2025-06-16T17:13:17+00:00

    Hello! Thank you for reaching out. I am Tin, an independent advisor, and glad to assist you today with this issue. A "Network Protocol Error" in Minecraft (especially in the Java version) usually indicates that the game is having problems communicating with a server because of a mismatch or disruption in network settings or game versions. Since you've done everything, like rebooting the router and computer, here are the best ways to easily fix the problem:

    1. Check Minecraft Version

    Most servers only accept certain versions of the game.

    Open Minecraft Launcher → choose the proper version at the bottom-left dropdown (for example, 1.20.1 or whatever the server is using).

    Then try joining again.

    1. Flush DNS Reset Network Stack

    May fix some of these weird protocol or routing issues:

    Press Windows + R, type cmd and press Ctrl + Shift + Enter to run as admin.

    Run these commands one at a time: pgsql

    ipconfig /flushdns

    ipconfig /release

    ipconfig /renew

    netsh int ip reset

    netsh winsock reset

    Reboot your PC.

    1. Try Direct Connect

    Just use this instead of joining from the server list: Direct Connect in Minecraft with IP and port, for example:

    play.examplemcserver.com

    If the server uses a custom port (e.g. : 25565) then use:

    makefile

    play.examplemcserver.com:25565

    1. Check Firewall or Antivirus

    Windows Firewall or third-party antivirus may block transferable traffic.

    Steps:

    Press Windows + I → Head to Privacy & Security > Windows Security > Firewall & network protection > Allow an app through firewall.

    Make sure it enables both Private and Public networks for the Java(TM) Platform SE binary.

    If you are using antivirus like Avast, BitDefender, etc., turn it off for a while and try to join.

    1. Disable IPv6 (optional but often effective)

    Some networks are not very friendly to IPv6 when using Minecraft:

    Control Panel > Network and Internet > Network Connections.

    Right-click your active connection → Properties.

    Uncheck the box next to Internet Protocol Version 6 (TCP/IPv6) → Click OK.

    Restart your computer.

    1. Reinstall or Repair Minecraft

    Corrupted network configs usually cause the problem:

    Back up your worlds.

    Uninstall Minecraft fully.

    Download a fresh copy of Minecraft from minecraft.net and install into your system.

    1. Try Using Mobile Hotspot

    Try to connect to the server by using your phone's mobile data via a USB or Wi-Fi hotspot.

    If this works, then the problem with your connection could be something your ISP or home network is doing to block specific ports or protocols.

    1. Check Server Status

    Try several servers, such as hypixel.net or play.cubecraft.net, to find out if it's just one server or all.

    If it's all servers then the issue is local.

    If it's just the one server then it is probably down, or banning your IP.

    Please try these steps and let me know how it goes. If you run into any issues, just reply back with the details.

    Best regards,

    Tin

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