Game crashes instantly on newest version 7.43.7

PastBear

This is the crash report:

---- Minecraft Crash Report ----

// My bad.

Time: 2025-04-04 12:59:08

Description: Bootstrap

java.lang.BootstrapMethodError: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_1293 failed
	at knot//net.minecraft.class_1291.<init>(class_1291.java:61)
	at knot//net.minecraft.class_1294.<clinit>(class_1294.java:17)
	at knot//net.minecraft.class_2246.method_63438(class_2246.java:318)
	at knot//net.minecraft.class_2246.method_63053(class_2246.java:1309)
	at knot//net.minecraft.class_2246.method_63064(class_2246.java:1322)
	at knot//net.minecraft.class_2246.<clinit>(class_2246.java:318)
	at knot//net.minecraft.class_2358.method_10199(class_2358.java:331)
	at knot//net.minecraft.class_2966.method_12851(class_2966.java:55)
	at knot//net.minecraft.client.main.Main.main(Main.java:139)
	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: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_1293 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(ClassLoader.java:526)
	... 12 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)
	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)
	... 16 more

Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [wurst.mixins.json:StatusEffectInstanceMixin from mod wurst] from phase [DEFAULT] in config [wurst.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)
	... 19 more

Caused by: org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException: Critical injection failure: @Inject annotation on onUpdateDuration could not find any targets matching 'Lnet/minecraft/class_1293;method_5588()I' in net/minecraft/class_1293. Using refmap Wurst-Client-refmap.json [INJECT_PREPARE Applicator Phase -> wurst.mixins.json:StatusEffectInstanceMixin from mod wurst -> Prepare Injections -> handler$bbc000$wurst$onUpdateDuration(Lorg/spongepowered/asm/mixin/injection/callback/CallbackInfoReturnable;)V -> Parse ->  -> Validate Targets]
	at org.spongepowered.asm.mixin.injection.selectors.TargetSelectors.validate(TargetSelectors.java:346)
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.readAnnotation(InjectionInfo.java:369)
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.<init>(InjectionInfo.java:340)
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.<init>(InjectionInfo.java:331)
	at org.spongepowered.asm.mixin.injection.struct.CallbackInjectionInfo.<init>(CallbackInjectionInfo.java:48)
	at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo$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)
	... 19 more

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

-- Head --
Thread: main
Stacktrace:
	at knot//net.minecraft.class_1291.<init>(class_1291.java:61)
	at knot//net.minecraft.class_1294.<clinit>(class_1294.java:17)
	at knot//net.minecraft.class_2246.method_63438(class_2246.java:318)
	at knot//net.minecraft.class_2246.method_63053(class_2246.java:1309)
	at knot//net.minecraft.class_2246.method_63064(class_2246.java:1322)
	at knot//net.minecraft.class_2246.<clinit>(class_2246.java:318)
	at knot//net.minecraft.class_2358.method_10199(class_2358.java:331)
	at knot//net.minecraft.class_2966.method_12851(class_2966.java:55)

-- Initialization --
Details:
	Modules: 
		ADVAPI32.dll:Erweiterte Windows 32 Base-API:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		COMCTL32.dll:Bibliothek für Steuerelemente:6.10 (WinBuild.160101.0800):Microsoft Corporation
		CRYPTBASE.dll:Base cryptographic API DLL:10.0.26100.2894 (WinBuild.160101.0800):Microsoft Corporation
		CRYPTSP.dll:Cryptographic Service Provider API:10.0.26100.2454 (WinBuild.160101.0800):Microsoft Corporation
		DBGHELP.DLL:Windows Image Helper:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
		DNSAPI.dll:DNS-Client-API-DLL:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		GDI32.dll:GDI Client DLL:10.0.26100.2033 (WinBuild.160101.0800):Microsoft Corporation
		IMM32.DLL:Multi-User Windows IMM32 API Client DLL:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
		IPHLPAPI.DLL:IP-Hilfs-API:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		KERNEL32.DLL:Client-DLL für Windows NT-Basis-API:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		KERNELBASE.dll:Client-DLL für Windows NT-Basis-API:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		MpOav.dll:IOfficeAntiVirus Module:4.18.25020.1009 (f9825cc40e26f897bbd18abcfcc53873f7599597):Microsoft Corporation
		NSI.dll:NSI User-mode interface DLL:10.0.26100.2894 (WinBuild.160101.0800):Microsoft Corporation
		OLEAUT32.dll:OLEAUT32.DLL:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		Ole32.dll:Microsoft OLE für Windows:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		POWRPROF.dll:Power Profile Helper DLL:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		PSAPI.DLL:Process Status Helper:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
		Pdh.dll:Windows Unterstützungs-DLL für Leistungsdaten:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		RPCRT4.dll:Remoteprozeduraufruf-Laufzeitumgebung:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		SHCORE.dll:SHCORE:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		SHELL32.dll:Allgemeine Windows-Shell-DLL:10.0.26100.3323 (WinBuild.160101.0800):Microsoft Corporation
		UMPDC.dll:User Mode Power Dependency Coordinator:10.0.26100.1301 (WinBuild.160101.0800):Microsoft Corporation
		USER32.dll:Client-DLL für Windows USER-API (mehrere Benutzer):10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		USERENV.dll:Userenv:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		VCRUNTIME140.dll:Microsoft® C Runtime Library:14.29.30139.0 built by: vcwrkspc:Microsoft Corporation
		VERSION.dll:Version Checking and File Installation Libraries:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
		WINHTTP.dll:Windows HTTP-Dienste:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		WINMM.dll:MCI API-DLL:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		WS2_32.dll:Windows Socket 2.0-32-Bit-DLL:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		amsi.dll:Anti-Malware Scan Interface:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
		bcrypt.dll:Bibliothek mit kryptografischen Primitiven von Windows:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		bcryptPrimitives.dll:Windows Cryptographic Primitives Library:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
		clbcatq.dll:COM+ Configuration Catalog:2001.12.10941.16384 (WinBuild.160101.0800):Microsoft Corporation
		combase.dll:Microsoft COM für Windows:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		dbgcore.DLL:Windows Core Debugging Helpers:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		fwpuclnt.dll:FWP/IPsec Benutzermodus-API:10.0.26100.3037 (WinBuild.160101.0800):Microsoft Corporation
		gdi32full.dll:GDI Client DLL:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		java.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		javaw.exe:OpenJDK Platform binary:21.0.3.0:Microsoft
		jimage.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		jli.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		jna9488344958276459556.dll:JNA native library:7.0.2:Java(TM) Native Access (JNA)
		jsvml.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		jvm.dll:OpenJDK 64-Bit server VM:21.0.3.0:Microsoft
		kernel.appcore.dll:AppModel API Host:10.0.26100.1591 (WinBuild.160101.0800):Microsoft Corporation
		management.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		management_ext.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		msvcp140.dll:Microsoft® C Runtime Library:14.29.30139.0 built by: vcwrkspc:Microsoft Corporation
		msvcp_win.dll:Microsoft® C Runtime Library:10.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
		msvcrt.dll:Windows NT CRT DLL:7.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
		mswsock.dll:Microsoft Windows Sockets 2.0-Dienstanbieter:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		napinsp.dll:E-Mail-Namenshimanbieter:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		net.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		nio.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		nlansp_c.dll:NLA Namespace Service Provider DLL:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		ntdll.dll:DLL für NT-Layer:10.0.26100.2454 (WinBuild.160101.0800):Microsoft Corporation
		perfos.dll:DLL für Windows-Systemleistungsobjekte:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		pfclient.dll:SysMain Client:10.0.26100.1301 (WinBuild.160101.0800):Microsoft Corporation
		profapi.dll:User Profile Basic API:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		rasadhlp.dll:Remote Access AutoDial Helper:10.0.26100.1150 (WinBuild.160101.0800):Microsoft Corporation
		rsaenh.dll:Microsoft Enhanced Cryptographic Provider:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
		sechost.dll:Host for SCM/SDDL/LSA Lookup APIs:10.0.26100.1 (WinBuild.160101.0800):Microsoft Corporation
		shlwapi.dll:Shell Light-weight-Hilfsprogrammbibliothek:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		ucrtbase.dll:Microsoft® C Runtime Library:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		vcruntime140_1.dll:Microsoft® C Runtime Library:14.29.30139.0 built by: vcwrkspc:Microsoft Corporation
		verify.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
		win32u.dll:Win32u:10.0.26100.3624 (WinBuild.160101.0800):Microsoft Corporation
		windows.storage.dll:Microsoft WinRT Storage-API:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		winrnr.dll:LDAP RnR Provider DLL:10.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
		wintypes.dll:Windows-Basistypen-DLL:10.0.26100.2308 (WinBuild.160101.0800):Microsoft Corporation
		wshbth.dll:Windows Sockets Helper DLL:10.0.26100.1882 (WinBuild.160101.0800):Microsoft Corporation
		zip.dll:OpenJDK Platform binary:21.0.3.0:Microsoft
Stacktrace:
	at knot//net.minecraft.client.main.Main.main(Main.java:139)
	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)

-- System Details --
Details:
	Minecraft Version: 1.21.5
	Minecraft Version ID: 1.21.5
	Operating System: Windows 11 (amd64) version 10.0
	Java Version: 21.0.3, Microsoft
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
	Memory: 578852864 bytes (552 MiB) / 939524096 bytes (896 MiB) up to 2147483648 bytes (2048 MiB)
	CPUs: 8
	Processor Vendor: GenuineIntel
	Processor Name: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
	Identifier: Intel64 Family 6 Model 140 Stepping 1
	Microarchitecture: Tiger Lake
	Frequency (GHz): 2.42
	Number of physical packages: 1
	Number of physical CPUs: 4
	Number of logical CPUs: 8
	Graphics card #0 name: Intel(R) Iris(R) Xe Graphics
	Graphics card #0 vendor: Intel Corporation
	Graphics card #0 VRAM (MiB): 1024.00
	Graphics card #0 deviceId: VideoController1
	Graphics card #0 versionInfo: 30.0.101.3111
	Memory slot #0 capacity (MiB): 8192.00
	Memory slot #0 clockSpeed (GHz): 3.20
	Memory slot #0 type: DDR4
	Virtual memory max (MiB): 19150.48
	Virtual memory used (MiB): 13052.32
	Swap memory total (MiB): 11264.00
	Swap memory used (MiB): 690.44
	Space in storage for jna.tmpdir (MiB): available: 311411.84, total: 486858.31
	Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 311411.84, total: 486858.31
	Space in storage for io.netty.native.workdir (MiB): available: 311411.84, total: 486858.31
	Space in storage for java.io.tmpdir (MiB): available: 311411.84, total: 486858.31
	Space in storage for workdir (MiB): available: 311411.84, total: 486858.31
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Fabric Mods: 
		fabric-api: Fabric API 0.119.5+1.21.5
			fabric-api-base: Fabric API Base 0.4.62+73a52b4b07
			fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.95+86c3a9f107
			fabric-biome-api-v1: Fabric Biome API (v1) 16.0.7+2dd063df07
			fabric-block-api-v1: Fabric Block API (v1) 1.0.37+86c3a9f107
			fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.26+aa6d566c07
			fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 2.0.16+86c3a9f107
			fabric-client-tags-api-v1: Fabric Client Tags 1.1.37+86c3a9f107
			fabric-command-api-v1: Fabric Command API (v1) 1.2.70+f71b366f07
			fabric-command-api-v2: Fabric Command API (v2) 2.2.49+73a52b4b07
			fabric-commands-v0: Fabric Commands (v0) 0.2.87+df3654b307
			fabric-content-registries-v0: Fabric Content Registries (v0) 10.0.11+216530c807
			fabric-convention-tags-v1: Fabric Convention Tags 2.1.27+7f945d5b07
			fabric-convention-tags-v2: Fabric Convention Tags (v2) 2.14.1+277f99c707
			fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.3.12+86c3a9f107
			fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.6.6+7b20cbb007
			fabric-data-generation-api-v1: Fabric Data Generation API (v1) 22.3.1+d94614b807
			fabric-dimensions-v1: Fabric Dimensions API (v1) 4.0.16+86c3a9f107
			fabric-entity-events-v1: Fabric Entity Events (v1) 2.0.25+27c1078f07
			fabric-events-interaction-v0: Fabric Events Interaction (v0) 4.0.13+73a52b4b07
			fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.70+c327076a07
			fabric-item-api-v1: Fabric Item API (v1) 11.3.1+eeb42f0207
			fabric-item-group-api-v1: Fabric Item Group API (v1) 4.2.8+3459fc6107
			fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.63+ecf51cdc07
			fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.61+df3654b307
			fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.5.13+5cbce67307
			fabric-loot-api-v2: Fabric Loot API (v2) 3.0.47+3f89f5a507
			fabric-loot-api-v3: Fabric Loot API (v3) 1.0.35+86c3a9f107
			fabric-message-api-v1: Fabric Message API (v1) 6.0.33+86c3a9f107
			fabric-model-loading-api-v1: Fabric Model Loading API (v1) 5.0.2+55bce67a07
			fabric-networking-api-v1: Fabric Networking API (v1) 4.4.0+f3ffa98907
			fabric-object-builder-api-v1: Fabric Object Builder API (v1) 21.0.0+7b20cbb007
			fabric-particles-v1: Fabric Particles (v1) 4.0.22+86c3a9f107
			fabric-recipe-api-v1: Fabric Recipe API (v1) 8.1.6+052a85d007
			fabric-registry-sync-v0: Fabric Registry Sync (v0) 6.1.20+b556383207
			fabric-renderer-api-v1: Fabric Renderer API (v1) 6.0.0+55bce67a07
			fabric-renderer-indigo: Fabric Renderer - Indigo 3.0.0+55bce67a07
			fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.64+73761d2e07
			fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.1.27+86c3a9f107
			fabric-rendering-v1: Fabric Rendering (v1) 11.1.11+081cc04307
			fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 5.0.21+73a52b4b07
			fabric-resource-loader-v0: Fabric Resource Loader (v0) 3.1.6+02ca679607
			fabric-screen-api-v1: Fabric Screen API (v1) 2.0.46+86c3a9f107
			fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.127+c327076a07
			fabric-sound-api-v1: Fabric Sound API (v1) 1.0.38+86c3a9f107
			fabric-tag-api-v1: Fabric Tag API (v1) 1.0.16+ecf51cdc07
			fabric-transfer-api-v1: Fabric Transfer API (v1) 5.4.23+7b20cbb007
			fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 6.3.17+f17a180c07
		fabricloader: Fabric Loader 0.16.12
			mixinextras: MixinExtras 0.4.1
		java: OpenJDK 64-Bit Server VM 21
		minecraft: Minecraft 1.21.5
		wurst: Wurst Client v7.46.6-MC1.21.4
	Launched Version: fabric-loader-0.16.12-1.21.5
	Launcher name: minecraft-launcher
	Backend library: LWJGL version 3.3.3-snapshot
	Backend API: Unknown
	Window size: <not initialized>
	GFLW Platform: <error>
	Render Extensions: ERR
	GL debug messages: <no renderer available>
	Is Modded: Definitely; Client brand changed to 'fabric'
	Universe: 404
	Type: Client (map_client.txt)
	Locale: de_DE
	System encoding: Cp1252
	File encoding: UTF-8
	CPU: 8x 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz

Alexander01998

Hey PastBear,

Thanks for the crash report! I can see what the problem is. You are not actually using the newest version 7.43.7. You are using version 7.46.6 for Minecraft 1.21.4, while trying to launch Minecraft 1.21.5.

Have a look at this part of the crash report near the bottom:

		minecraft: Minecraft 1.21.5
		wurst: Wurst Client v7.46.6-MC1.21.4
	Launched Version: fabric-loader-0.16.12-1.21.5

This is what's causing your crash.

Since you say you have Wurst 7.43.7 for Minecraft 1.21.5, it might be that you have indeed downloaded this file, but placed it in the wrong folder, for example in your downloads folder. You need to move this file to C:\Users\YourName\AppData\Roaming\.minecraft\mods and delete the older v7.46.6 file that you have there.

Hope this helps!