Every time i click customize under superflat, it crashes the game. I tried with specific biome, and it works there. I don't know but I looked at the crash report and it seemed to be tweakeroo. Pls help

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 12/6/20 4:09 PM
Description: mouseClicked event handler

org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:208)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:178)
at org.spongepowered.asm.mixin.transformer.FabricMixinTransformerProxy.transformClassBytes(FabricMixinTransformerProxy.java:23)
at net.fabricmc.loader.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:157)
at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:150)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at net.minecraft.class_5317.method_29088(class_5317.java:103)
at net.minecraft.class_5317$$Lambda$3623/410671928.createEditScreen(Unknown Source)
at net.minecraft.class_5292.method_28087(class_5292.java:153)
at net.minecraft.class_5292$$Lambda$3640/2135000930.onPress(Unknown Source)
at net.minecraft.class_4185.method_25306(class_4185.java:33)
at net.minecraft.class_4264.method_25348(class_4264.java:16)
at net.minecraft.class_339.method_25402(class_339.java:149)
at net.minecraft.class_4069.method_25402(class_4069.java:27)
at net.minecraft.class_312.method_1611(class_312.java:92)
at net.minecraft.class_312$$Lambda$3271/1178867540.run(Unknown Source)
at net.minecraft.class_437.method_25412(class_437.java:435)
at net.minecraft.class_312.method_1601(class_312.java:92)
at net.minecraft.class_312.method_22686(class_312.java:162)
at net.minecraft.class_312$$Lambda$3147/2086416690.run(Unknown Source)
at net.minecraft.class_1255.execute(class_1255.java:104)
at net.minecraft.class_312.method_22684(class_312.java:162)
at net.minecraft.class_312$$Lambda$2610/1025466899.invoke(Unknown Source)
at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
at org.lwjgl.system.JNI.invokeV(Native Method)
at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174)
at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(RenderSystem.java:127)
at net.minecraft.class_310.method_1523(class_310.java:1071)
at net.minecraft.class_310.method_1514(class_310.java:681)
at net.minecraft.client.main.Main.main(Main.java:215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:141)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)
Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [mixins.tweakeroo.json:MixinPresetsScreen] from phase [DEFAULT] in config [mixins.tweakeroo.json] FAILED during APPLY
at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:642)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinApplyError(MixinProcessor.java:594)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:356)
... 37 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: @shadow field presets was not located in the target class net.minecraft.class_430. Using refmap tweakeroo-fabric-1.16.4-refmap.json
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachFields(MixinPreProcessorStandard.java:610)
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:289)
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:264)
at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1272)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:287)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:345)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:569)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:351)
... 37 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:363)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:208)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:178)
at org.spongepowered.asm.mixin.transformer.FabricMixinTransformerProxy.transformClassBytes(FabricMixinTransformerProxy.java:23)
at net.fabricmc.loader.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:157)
at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:150)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at net.minecraft.class_5317.method_29088(class_5317.java:103)
at net.minecraft.class_5317$$Lambda$3623/410671928.createEditScreen(Unknown Source)
at net.minecraft.class_5292.method_28087(class_5292.java:153)
at net.minecraft.class_5292$$Lambda$3640/2135000930.onPress(Unknown Source)
at net.minecraft.class_4185.method_25306(class_4185.java:33)
at net.minecraft.class_4264.method_25348(class_4264.java:16)
at net.minecraft.class_339.method_25402(class_339.java:149)

-- OptiFabric --
Details:
OptiFine jar designed for: 1.16.4
OptiFine jar version: OptiFine_1.16.4_HD_U_G4_pre1
OptiFine jar status: Valid OptiFine installer
OptiFine remapped jar: C:\Users\Jonah\AppData\Roaming.minecraft.optifine\OptiFine_1.16.4_HD_U_G4_pre1\Optifine-mapped.jar
OptiFabric error:
Stacktrace:
at net.minecraft.class_128.handler$zfp000$fillSystemDetails(class_128.java:523)
at net.minecraft.class_128.(class_128.java:55)
at net.minecraft.class_128.method_560(class_128.java:417)
at net.minecraft.class_437.method_25412(class_437.java:437)
at net.minecraft.class_312.method_1601(class_312.java:92)
at net.minecraft.class_312.method_22686(class_312.java:162)
at net.minecraft.class_312$$Lambda$3147/2086416690.run(Unknown Source)
at net.minecraft.class_1255.execute(class_1255.java:104)
at net.minecraft.class_312.method_22684(class_312.java:162)
at net.minecraft.class_312$$Lambda$2610/1025466899.invoke(Unknown Source)
at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
at org.lwjgl.system.JNI.invokeV(Native Method)
at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174)
at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(RenderSystem.java:127)
at net.minecraft.class_310.method_1523(class_310.java:1071)
at net.minecraft.class_310.method_1514(class_310.java:681)
at net.minecraft.client.main.Main.main(Main.java:215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:141)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)

-- Affected screen --
Details:
Screen name: net.minecraft.class_525

-- System Details --
Details:
Minecraft Version: 1.16.4
Minecraft Version ID: 1.16.4
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 578729088 bytes (551 MB) / 1308622848 bytes (1248 MB) up to 2147483648 bytes (2048 MB)
CPUs: 4
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:
clientcommands: Client Commands 2.4.8
fabric: Fabric API 0.25.1+build.416-1.16
fabric-api-base: Fabric API Base 0.2.0+9f0fb4b83a
fabric-biome-api-v1: Fabric Biome API (v1) 3.0.0+8367596d3a
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.4+c6a8ea893a
fabric-command-api-v1: Fabric Command API (v1) 1.0.9+a4467d2a3a
fabric-commands-v0: Fabric Commands (v0) 0.2.0+52d308363a
fabric-containers-v0: Fabric Containers (v0) 0.1.8+045df74f3a
fabric-content-registries-v0: Fabric Content Registries (v0) 0.1.9+059ea8663a
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+b7f9825d3a
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.1+f8ac1db23a
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.0+16acbe5b3a
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.3+a4467d2a3a
fabric-item-api-v1: Fabric Item API (v1) 1.2.0+f8ac1db23a
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.1+a4467d2a3a
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.1+730711c63a
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.0+3fa9f7c53a
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.2.0+74cc3b203a
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.1+432ea1883a
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.2+b764ce993a
fabric-models-v0: Fabric Models (v0) 0.1.1+f8ac1db23a
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.5+b50ffc7b3a
fabric-networking-v0: Fabric Networking (v0) 0.1.10+e00ecb5f3a
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.9.2+a89534ab3a
fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.1+a4467d2a3a
fabric-particles-v1: fabric-particles-v1 0.2.2+fb0d9b0e3a
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.6.1+a4467d2a3a
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.3.3+a4467d2a3a
fabric-renderer-indigo: Fabric Renderer - Indigo 0.4.3+a4467d2a3a
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 2.2.0+f8ac1db23a
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.4+f8ac1db23a
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.12+f8ac1db23a
fabric-rendering-v0: Fabric Rendering (v0) 1.1.1+f8ac1db23a
fabric-rendering-v1: Fabric Rendering (v1) 1.3.1+f8ac1db23a
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.3.1+facf3bbf3a
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.0+872498413a
fabric-structure-api-v1: Fabric Structure API (v1) 1.1.0+f8ac1db23a
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.0.3+ac8e8c593a
fabric-textures-v0: Fabric Textures (v0) 1.0.5+a4467d2a3a
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.4+2b4623793a
fabricloader: Fabric Loader 0.10.6+build.214
itemscroller: Item Scroller 0.15.0-dev.20201103.183933
litematica: Litematica 0.0.0-dev.20201103.184101
malilib: MaLiLib 0.10.0-dev.21+arne.1
minecraft: Minecraft 1.16.4
minihud: MiniHUD 0.19.0-dev.20201103.184029
mm: Manningham Mills 2.1
multiconnect-api: MultiConnect API 1.3.9
optifabric: OptiFabric 1.8.0
tweakeroo: Tweakeroo 0.10.0-dev.20201103.184154
Launched Version: fabric-loader-0.10.6+build.214-1.16.4
Backend library: LWJGL version 3.2.2 build 10
Backend API: GeForce GTX 960/PCIe/SSE2 GL version 4.6.0 NVIDIA 442.59, NVIDIA Corporation
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Graphics mode: fancy
Resource Packs: vanilla, programer_art, file/Faithful-1.16.2.zip, file/Netherwart_Growth_Stage.zip (incompatible), file/Honey Layers.zip (incompatible), file/classic-netherite.zip (incompatible), file/Broken Items Addon for Faithful 1.15.zip (incompatible), fabric/clientcommands (incompatible), fabric/fabric, fabric/fabric-api-base, fabric/fabric-biome-api-v1, fabric/fabric-blockrenderlayer-v1, fabric/fabric-containers-v0, fabric/fabric-content-registries-v0, fabric/fabric-crash-report-info-v1, fabric/fabric-events-interaction-v0, fabric/fabric-events-lifecycle-v0, fabric/fabric-game-rule-api-v1, fabric/fabric-item-api-v1, fabric/fabric-item-groups-v0, fabric/fabric-key-binding-api-v1, fabric/fabric-keybindings-v0, fabric/fabric-lifecycle-events-v1, fabric/fabric-loot-tables-v1, fabric/fabric-mining-levels-v0, fabric/fabric-models-v0, fabric/fabric-networking-blockentity-v0, fabric/fabric-networking-v0, fabric/fabric-object-builder-api-v1, fabric/fabric-object-builders-v0, fabric/fabric-registry-sync-v0, fabric/fabric-renderer-api-v1, fabric/fabric-renderer-indigo, fabric/fabric-renderer-registries-v1, fabric/fabric-rendering-data-attachment-v1, fabric/fabric-rendering-fluids-v1, fabric/fabric-rendering-v0, fabric/fabric-rendering-v1, fabric/fabric-resource-loader-v0, fabric/fabric-screen-handler-api-v1, fabric/fabric-tag-extensions-v0, fabric/fabric-textures-v0, fabric/fabric-tool-attribute-api-v1, fabric/fabricloader, fabric/litematica (incompatible), fabric/malilib (incompatible), fabric/minihud (incompatible), fabric/mm, fabric/multiconnect-api, fabric/optifabric, file/mooblooms, fabric/fabric-command-api-v1, fabric/itemscroller (incompatible), fabric/tweakeroo (incompatible)
Current Language: English (US)
CPU: 4x Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
OptiFine Version: OptiFine_1.16.4_HD_U_G4_pre1
OptiFine Build: 20201102-235235
Render Distance Chunks: 20
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.6.0 NVIDIA 442.59
OpenGlRenderer: GeForce GTX 960/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 4

oh ok, thanks.

Update to the latest Tweakeroo version, this was fixed in the 2020-11-10 build.