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I tried installing several mods that improves fps with other several gameplay mods that i have added previously and tested to be playable. But when I have added the new mods that improves the fps, Java crashes. (version is 1.20.1) Here is the crash log: ---- Minecraft Crash Report ---- // But it works on my machine. Time: 2023-12-08 17:22:22 Description: Initializing game java.lang.IncompatibleClassChangeError: class net.coderbot.iris.gui.option.ShadowDistanceOption cannot inherit from final class net.minecraft.client.OptionInstance at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?] {} at java.lang.ClassLoader.defineClass(ClassLoader.java:1017) ~[?:?] {} at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:119) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135) ~[securejarhandler-2.1.10.jar:?] {} at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?] {} at net.coderbot.iris.config.IrisConfig.load(IrisConfig.java:142) ~[oculus-mc1.20.1-1.6.9.jar%23179!/:?] {re:classloading} at net.coderbot.iris.config.IrisConfig.initialize(IrisConfig.java:58) ~[oculus-mc1.20.1-1.6.9.jar%23179!/:?] {re:classloading} at net.coderbot.iris.Iris.onEarlyInitialize(Iris.java:146) ~[oculus-mc1.20.1-1.6.9.jar%23179!/:?] {re:mixin,re:classloading} at net.minecraft.client.Options.handler$zgi000$iris$beforeLoadOptions(Options.java:1430) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.oculus.json:MixinOptions_Entrypoint,pl:mixin:APP:mixins.oculus.fixes.maxfpscrash.json:MixinMaxFpsCrashFix,pl:mixin:APP:mixins.oculus.json:sky.MixinOptions_CloudsOverride,pl:mixin:A,pl:runtimedistcleaner:A} at net.minecraft.client.Options.m_92140_(Options.java) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.oculus.json:MixinOptions_Entrypoint,pl:mixin:APP:mixins.oculus.fixes.maxfpscrash.json:MixinMaxFpsCrashFix,pl:mixin:APP:mixins.oculus.json:sky.MixinOptions_CloudsOverride,pl:mixin:A,pl:runtimedistcleaner:A} at net.minecraft.client.Options.<init>(Options.java:888) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.oculus.json:MixinOptions_Entrypoint,pl:mixin:APP:mixins.oculus.fixes.maxfpscrash.json:MixinMaxFpsCrashFix,pl:mixin:APP:mixins.oculus.json:sky.MixinOptions_CloudsOverride,pl:mixin:A,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.<init>(Minecraft.java:425) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:rubidium_extras.mixins.json:FrameCounter.FpsAccessorMixin,pl:mixin:APP:rubidium.mixins.json:core.MinecraftClientMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:A,pl:runtimedistcleaner:A} at net.minecraft.client.main.Main.main(Main.java:182) ~[1.20.1-forge-47.2.0.jar:?] {re:classloading,pl:runtimedistcleaner:A} at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {} at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {} at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {} at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {} at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111) ~[fmlloader-1.20.1-47.2.0.jar:?] {} at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.clientService(CommonLaunchHandler.java:99) ~[fmlloader-1.20.1-47.2.0.jar:?] {} at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$makeService$0(CommonClientLaunchHandler.java:25) ~[fmlloader-1.20.1-47.2.0.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.Launcher.run(Launcher.java:108) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] {} A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Thread: Render thread Stacktrace: at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?] {} at java.lang.ClassLoader.defineClass(ClassLoader.java:1017) ~[?:?] {} at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:119) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {} at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135) ~[securejarhandler-2.1.10.jar:?] {} at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?] {} at net.coderbot.iris.config.IrisConfig.load(IrisConfig.java:142) ~[oculus-mc1.20.1-1.6.9.jar%23179!/:?] {re:classloading} at net.coderbot.iris.config.IrisConfig.initialize(IrisConfig.java:58) ~[oculus-mc1.20.1-1.6.9.jar%23179!/:?] {re:classloading} at net.coderbot.iris.Iris.onEarlyInitialize(Iris.java:146) ~[oculus-mc1.20.1-1.6.9.jar%23179!/:?] {re:mixin,re:classloading} at net.minecraft.client.Options.handler$zgi000$iris$beforeLoadOptions(Options.java:1430) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.oculus.json:MixinOptions_Entrypoint,pl:mixin:APP:mixins.oculus.fixes.maxfpscrash.json:MixinMaxFpsCrashFix,pl:mixin:APP:mixins.oculus.json:sky.MixinOptions_CloudsOverride,pl:mixin:A,pl:runtimedistcleaner:A} at net.minecraft.client.Options.m_92140_(Options.java) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.oculus.json:MixinOptions_Entrypoint,pl:mixin:APP:mixins.oculus.fixes.maxfpscrash.json:MixinMaxFpsCrashFix,pl:mixin:APP:mixins.oculus.json:sky.MixinOptions_CloudsOverride,pl:mixin:A,pl:runtimedistcleaner:A} at net.minecraft.client.Options.<init>(Options.java:888) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.oculus.json:MixinOptions_Entrypoint,pl:mixin:APP:mixins.oculus.fixes.maxfpscrash.json:MixinMaxFpsCrashFix,pl:mixin:APP:mixins.oculus.json:sky.MixinOptions_CloudsOverride,pl:mixin:A,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.<init>(Minecraft.java:425) ~[client-1.20.1-20230612.114412-srg.jar%23189!/:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:rubidium_extras.mixins.json:FrameCounter.FpsAccessorMixin,pl:mixin:APP:rubidium.mixins.json:core.MinecraftClientMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:A,pl:runtimedistcleaner:A} -- Initialization -- Details: Modules: Stacktrace: at net.minecraft.client.main.Main.main(Main.java:182) ~[1.20.1-forge-47.2.0.jar:?] {re:classloading,pl:runtimedistcleaner:A} at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {} at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {} at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {} at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {} at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111) ~[fmlloader-1.20.1-47.2.0.jar:?] {} at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.clientService(CommonLaunchHandler.java:99) ~[fmlloader-1.20.1-47.2.0.jar:?] {} at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$makeService$0(CommonClientLaunchHandler.java:25) ~[fmlloader-1.20.1-47.2.0.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.Launcher.run(Launcher.java:108) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar:?] {} at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] {} -- System Details -- Details: Minecraft Version: 1.20.1 Minecraft Version ID: 1.20.1 Operating System: Mac OS X (aarch64) version 14.1.2 Java Version: 17.0.8, Microsoft Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft Memory: 285189552 bytes (271 MiB) / 536870912 bytes (512 MiB) up to 2147483648 bytes (2048 MiB) CPUs: 8 Processor Vendor: Apple Inc. Processor Name: Apple M1 Identifier: Apple Inc. Family 0x1b588bb3 Model 0 Stepping 0 Microarchitecture: ARM64 SoC: Firestorm + Icestorm Frequency (GHz): 3.20 Number of physical packages: 1 Number of physical CPUs: 8 Number of logical CPUs: 8 Graphics card #0 name: Apple M1 Graphics card #0 vendor: Apple (0x106b) Graphics card #0 VRAM (MB): 0.00 Graphics card #0 deviceId: unknown Graphics card #0 versionInfo: unknown Memory slot #0 capacity (MB): 0.00 Memory slot #0 clockSpeed (GHz): 0.00 Memory slot #0 type: unknown Virtual memory max (MB): 11264.00 Virtual memory used (MB): 7656.59 Swap memory total (MB): 3072.00 Swap memory used (MB): 1509.94 JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Launched Version: 1.20.1-forge-47.2.0 Backend library: LWJGL version 3.3.1 build 7 Backend API: Unknown Window size: <not initialized> GL Caps: Using framebuffer using OpenGL 3.2 GL debug messages: <disabled> Using VBOs: Yes Is Modded: Definitely; Client brand changed to 'forge' Type: Client (map_client.txt) CPU: <unknown>

I will try it, thanks.

I wanted to play minecraft with some mods from forge, i have check that they are 1.20.1 but whenever i tried to create a minecraft world, it crashes. here is the crash report: https://paste.ee/p/IvBHL any help is appreciate it, i will check back on this forum tmr