---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 11/13/21, 5:23 PM
Description: Initializing game

org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:156) ~[modlauncher-9.0.7.jar:9.0.7+91+master.8569cdf] {}
at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-9.0.7.jar:?] {}
at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-9.0.7.jar:?] {}
at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-9.0.7.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:110) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:213) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:223) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:213) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:130) ~[securejarhandler-0.9.54.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:519) ~[?:?] {}
at net.minecraft.client.renderer.block.BlockRenderDispatcher.(BlockRenderDispatcher.java:50) ~[client-1.17.1-20210706.113038-srg.jar%2380!:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
at net.minecraft.client.Minecraft.(Minecraft.java:502) ~[client-1.17.1-20210706.113038-srg.jar%2380!:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:fallingleaves.mixins.json:MinecraftClientMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:151) ~[client-1.17.1-20210706.113038-srg.jar%2380!:?] {re:classloading,pl:runtimedistcleaner:A}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[?:?] {}
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
at java.lang.reflect.Method.invoke(Method.java:567) ~[?:?] {}
at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$launchService$0(CommonClientLaunchHandler.java:45) ~[fmlloader-1.17.1-37.0.109.jar%2322!:?] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:90) [bootstraplauncher-0.1.17.jar:?] {}
Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [valhelsia_structures.mixins.json:BlockModelRendererMixin] from phase [DEFAULT] in config [valhelsia_structures.mixins.json] FAILED during APPLY
at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:636) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinApplyError(MixinProcessor.java:588) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:379) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
... 29 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: @shadow method tesselateWithAO in valhelsia_structures.mixins.json:BlockModelRendererMixin was not located in the target class net.minecraft.client.renderer.block.ModelBlockRenderer. Using refmap valhelsia_structures.refmap.json
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachSpecialMethod(MixinPreProcessorStandard.java:442) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachShadowMethod(MixinPreProcessorStandard.java:415) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachMethods(MixinPreProcessorStandard.java:343) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:302) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:280) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1288) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:292) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:383) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:365) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
... 29 more

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

-- Head --
Thread: Render thread
Stacktrace:
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}
at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:156) ~[modlauncher-9.0.7.jar:9.0.7+91+master.8569cdf] {}
at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-9.0.7.jar:?] {}
at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-9.0.7.jar:?] {}
at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-9.0.7.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:110) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:213) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:223) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:213) ~[securejarhandler-0.9.54.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:130) ~[securejarhandler-0.9.54.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:519) ~[?:?] {}
at net.minecraft.client.renderer.block.BlockRenderDispatcher.(BlockRenderDispatcher.java:50) ~[client-1.17.1-20210706.113038-srg.jar%2380!:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
at net.minecraft.client.Minecraft.(Minecraft.java:502) ~[client-1.17.1-20210706.113038-srg.jar%2380!:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:fallingleaves.mixins.json:MinecraftClientMixin,pl:mixin:A,pl:runtimedistcleaner:A}
-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.main.Main.main(Main.java:151) ~[client-1.17.1-20210706.113038-srg.jar%2380!:?] {re:classloading,pl:runtimedistcleaner:A}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[?:?] {}
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
at java.lang.reflect.Method.invoke(Method.java:567) ~[?:?] {}
at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$launchService$0(CommonClientLaunchHandler.java:45) ~[fmlloader-1.17.1-37.0.109.jar%2322!:?] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) [modlauncher-9.0.7.jar%235!:?] {}
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:90) [bootstraplauncher-0.1.17.jar:?] {}

-- System Details --
Details:
Minecraft Version: 1.17.1
Minecraft Version ID: 1.17.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 16.0.1, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 2944088208 bytes (2807 MiB) / 3506438144 bytes (3344 MiB) up to 12884901888 bytes (12288 MiB)
CPUs: 12
Processor Vendor: AuthenticAMD
Processor Name: AMD Ryzen 5 5600X 6-Core Processor
Identifier: AuthenticAMD Family 25 Model 33 Stepping 0
Microarchitecture: Zen 3
Frequency (GHz): 3.70
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 12
Graphics card #0 name: NVIDIA GeForce GTX 1050 Ti
Graphics card #0 vendor: NVIDIA (0x10de)
Graphics card #0 VRAM (MB): 4095.00
Graphics card #0 deviceId: 0x1c82
Graphics card #0 versionInfo: DriverVersion=30.0.14.7212
Memory slot #0 capacity (MB): 8192.00
Memory slot #0 clockSpeed (GHz): 2.67
Memory slot #0 type: DDR4
Memory slot #1 capacity (MB): 8192.00
Memory slot #1 clockSpeed (GHz): 2.67
Memory slot #1 type: DDR4
Virtual memory max (MB): 33718.23
Virtual memory used (MB): 24522.97
Swap memory total (MB): 17408.00
Swap memory used (MB): 1080.53
JVM Flags: 5 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx12288m -Xms256m -XX:PermSize=256m
Launched Version: forge-37.0.109
Backend library: LWJGL version 3.2.2 SNAPSHOT
Backend API: NVIDIA GeForce GTX 1050 Ti/PCIe/SSE2 GL version 3.2.0 NVIDIA 472.12, NVIDIA Corporation
Window size:
GL Caps: Using framebuffer using OpenGL 3.2
GL debug messages:
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'forge'
Type: Client (map_client.txt)
CPU: 12x AMD Ryzen 5 5600X 6-Core Processor
OptiFine Version: OptiFine_1.17.1_HD_U_H1
OptiFine Build: 20211104-012451
Render Distance Chunks: 8
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: Sildurs Vibrant Shaders v1.29 Extreme.zip
OpenGlVersion: 3.2.0 NVIDIA 472.12
OpenGlRenderer: NVIDIA GeForce GTX 1050 Ti/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 12
ModLauncher: 9.0.7+91+master.8569cdf
ModLauncher launch target: forgeclient
ModLauncher naming: srg
ModLauncher services:
mixin PLUGINSERVICE
eventbus PLUGINSERVICE
object_holder_definalize PLUGINSERVICE
runtime_enum_extender PLUGINSERVICE
capability_token_subclass PLUGINSERVICE
capability_inject_definalize PLUGINSERVICE
accesstransformer PLUGINSERVICE
runtimedistcleaner PLUGINSERVICE
mixin TRANSFORMATIONSERVICE
OptiFine TRANSFORMATIONSERVICE
fml TRANSFORMATIONSERVICE
FML Language Providers:
[email protected]
javafml@null
Mod List:
client-1.17.1-20210706.113038-srg.jar |Minecraft |minecraft |1.17.1 |COMMON_SET|Manifest: a1:d4:5e:04:4f:d3:d6:e0:7b:37:97:cf:77:b0:de:ad:4a:47:ce:8c:96:49:5f:0a:cf:8c:ae:b2:6d:4b:8a:3f
morevillagers-FORGE-1.17-2.1.1.jar |More Villagers |morevillagers |2.1.1 |COMMON_SET|Manifest: NOSIGNATURE
AmbientSounds_v4.0.4_mc1.17.1.jar |Ambient Sounds |ambientsounds |3.0.3 |COMMON_SET|Manifest: NOSIGNATURE
MouseTweaks-forge-mc1.17.1-2.15.jar |Mouse Tweaks |mousetweaks |2.15 |COMMON_SET|Manifest: NOSIGNATURE
BiomesOPlenty-1.17.1-14.0.0.36-universal.jar |Biomes O' Plenty |biomesoplenty |1.17.1-14.0.0.36 |COMMON_SET|Manifest: NOSIGNATURE
CreativeCore_v2.3.0_mc1.17.1.jar |CreativeCore |creativecore |2.3.0 |COMMON_SET|Manifest: NOSIGNATURE
Chunky-1.2.124.jar |Chunky |chunky |1.2.124 |COMMON_SET|Manifest: NOSIGNATURE
nether-s-exoticism-1.17.1-1.1.2.jar |Nether's Exoticism |nethers_exoticism |1.1.2 |COMMON_SET|Manifest: NOSIGNATURE
Fallingleaves-1.17.1-1.2.1.jar |Falling Leaves |fallingleaves |1.2.1 |COMMON_SET|Manifest: NOSIGNATURE
betterbiomeblend-1.17.1-1.2.9-forge.jar |BetterBiomeBlend |betterbiomeblend |1.17.1-1.2.9-forge |COMMON_SET|Manifest: NOSIGNATURE
advancednetherite-1.9.0-1.17.1.jar |Advanced Netherite |advancednetherite |1.9.0 |COMMON_SET|Manifest: NOSIGNATURE
citadel-1.9.3-1.17.1.jar |Citadel |citadel |1.9.3 |COMMON_SET|Manifest: NOSIGNATURE
alexsmobs-1.13.1.jar |Alex's Mobs |alexsmobs |1.13.1 |COMMON_SET|Manifest: NOSIGNATURE
NaturesCompass-1.17.1-1.9.2-forge.jar |Nature's Compass |naturescompass |1.17.1-1.9.2-forge |COMMON_SET|Manifest: NOSIGNATURE
SereneSeasons-1.17.1-5.0.0.6-universal.jar |Serene Seasons |sereneseasons |1.17.1-5.0.0.6 |COMMON_SET|Manifest: NOSIGNATURE
Bigger-Caves-1.17.1-v1.0.jar |Example Mod |bigger_caves |1.0 |COMMON_SET|Manifest: NOSIGNATURE
architectury-2.6.35.jar |Architectury |architectury |2.6.35 |COMMON_SET|Manifest: NOSIGNATURE
AI-Improvements-1.17.1-0.3.0.jar |AI-Improvements |aiimprovements |0.3.0 |COMMON_SET|Manifest: NOSIGNATURE
restored_earth-1.17.1-1.1.1.jar |Restored Earth |restored_earth |1.1.1 |COMMON_SET|Manifest: NOSIGNATURE
cloth-config-5.1.40-forge.jar |Cloth Config v4 API |cloth_config |5.1.40 |COMMON_SET|Manifest: NOSIGNATURE
outvoted-1.5.0-beta.3.jar |Outvoted |outvoted |1.5.0-beta.3 |COMMON_SET|Manifest: NOSIGNATURE
3dSkinLayers-forge-1.2.1.jar |3dSkinLayers |skinlayers3d |1.2.1 |COMMON_SET|Manifest: NOSIGNATURE
forge-1.17.1-37.0.109-universal.jar |Forge |forge |37.0.109 |COMMON_SET|Manifest: 22:af:21:d8:19:82:7f:93:94:fe:2b:ac:b7:e4:41:57:68:39:87:b1:a7:5c:c6:44:f9:25:74:21:14:f5:0d:90
FastLeafDecay-26.jar |FastLeafDecay |fastleafdecay |26 |COMMON_SET|Manifest: NOSIGNATURE
valhelsia_core-1.17.1-0.2.0.jar |Valhelsia Core |valhelsia_core |1.17.1-0.2.0 |COMMON_SET|Manifest: NOSIGNATURE
valhelsia_structures-1.17.1-0.1.0.jar |Valhelsia Structures |valhelsia_structures |1.17.1-0.1.0 |COMMON_SET|Manifest: NOSIGNATURE
geckolib-1.17.1-3.0.9.jar |GeckoLib |geckolib3 |3.0.9 |COMMON_SET|Manifest: NOSIGNATURE
corpse-1.17.1-1.0.4.jar |Corpse |corpse |1.17.1-1.0.4 |COMMON_SET|Manifest: NOSIGNATURE
Crash Report UUID: ff21f6cb-1aac-4506-9f68-8157f1bceb05
FML: 37.0
Forge: net.minecraftforge:37.0.109

I've had this same error in my mod collection.
After a lot of testing, I discovered that OptiFine_1.17.1_HD_U_H1 was the cause of the error when also attempting to load Valhelsia Structures.
When I removed OptiFine, the game loaded up normally.
There are a few mods that are currently incompatible with 1.17.1 OptiFine and Valhelsia Structures seems to be one of them right now.

Now fixed with this version: https://www.curseforge.com/minecraft/mc-mods/valhelsia-structures/files/3531577. Thanks for your report.