java.lang.NoClassDefFoundError: cen

[Ectoniqua]

So I was trying to play minecraft with some mods but i kept getting this crash. I tried to remove mods but it didn't work so I figured that it was optifine. Any way to fix this? I tried other versions of optifine too but it did not work.

---- Minecraft Crash Report ----

WARNING: coremods are present: ModTweaker (Patcher-1.3 (1.8.9).jar) Perspective Mod ([1.8.9] Perspective Mod-3.0.jar) FMLLoadingPlugin (Scrollable Tooltips-1.2 (1.8.9).jar) FMLLoadingPlugin (AutoGG-3.4 (1.8.9).jar) Main (OldAnimationsMod v2.4.2 FORGE MC1.8.9.jar) PatcherTweaker (Patcher-1.3 (1.8.9).jar) SkyblockAddonsLoadingPlugin (SkyblockAddons-1.5.4-for-MC-1.8.9.jar) CTJSLoadingPlugin (ctjs-1.3.0-1.8.9.jar) Contact their authors BEFORE contacting forge

// Why is it breaking :(

Time: 9/20/20 9:59 PM Description: Initializing game

java.lang.NoClassDefFoundError: cen at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2583) at java.lang.Class.getField0(Class.java:2975) at java.lang.Class.getField(Class.java:1701) at net.minecraftforge.fml.client.FMLClientHandler.detectOptifine(FMLClientHandler.java:277) at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:191) at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:417) at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329) at net.minecraft.client.main.Main.main(SourceFile:124) 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.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) Caused by: java.lang.ClassNotFoundException: cen at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 15 more Caused by: java.lang.NullPointerException at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ... 17 more

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

-- Head -- Stacktrace: at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2583) at java.lang.Class.getField0(Class.java:2975) at java.lang.Class.getField(Class.java:1701) at net.minecraftforge.fml.client.FMLClientHandler.detectOptifine(FMLClientHandler.java:277) at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:191) at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:417)

-- Initialization -- Details: Stacktrace: at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329) at net.minecraft.client.main.Main.main(SourceFile:124) 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.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details -- Details: ct.js modules: [] Minecraft Version: 1.8.9 Operating System: Windows 8 (amd64) version 6.2 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 521469880 bytes (497 MB) / 805306368 bytes (768 MB) up to 4294967296 bytes (4096 MB) JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 FML: Loaded coremods (and transformers): ModTweaker (Patcher-1.3 (1.8.9).jar) club.sk1er.patcher.tweaker.other.ModClassTransformer Perspective Mod ([1.8.9] Perspective Mod-3.0.jar) net.canelex.perspectivemod.asm.CameraTransformer FMLLoadingPlugin (Scrollable Tooltips-1.2 (1.8.9).jar) club.sk1er.mods.overflowscroll.forge.ClassTransformer FMLLoadingPlugin (AutoGG-3.4 (1.8.9).jar) club.sk1er.mods.core.forge.ClassTransformer Main (OldAnimationsMod v2.4.2 FORGE MC1.8.9.jar) com.spiderfrog.main.ClassTransformer PatcherTweaker (Patcher-1.3 (1.8.9).jar) club.sk1er.mods.core.forge.ClassTransformer club.sk1er.patcher.tweaker.ClassTransformer SkyblockAddonsLoadingPlugin (SkyblockAddons-1.5.4-for-MC-1.8.9.jar) codes.biscuit.skyblockaddons.tweaker.SkyblockAddonsTransformer CTJSLoadingPlugin (ctjs-1.3.0-1.8.9.jar) com.chattriggers.ctjs.launch.plugin.CTJSTransformer Launched Version: 1.8.9-forge1.8.9-11.15.1.2318-1.8.9 LWJGL: 2.9.4 OpenGL: Intel(R) HD Graphics 4400 GL version 4.0.0 - Build 9.18.10.3224, Intel GL Caps: Using GL 1.3 multitexturing. Using GL 1.3 texture combiners. Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported. Shaders are available because OpenGL 2.1 is supported. VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: FurfSky+ Release 1.7.1 - Compatibility.zip, x16 Clear Glass 1.7-1.8.zip, §1§lDungeons Pack.zip
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i7-4500U CPU @ 1.80GHz

[jrbudda]

the fact that all the mods say 1.8.9 is highly suspicious.

[Ectoniqua]

wdym. i play on 1.8.9. these mods are for a server.

[TropheusJ]

This isn’t even vivecraft

[Ectoniqua]

This isn’t even vivecraft

sorry, i was trying to search this problem and jrbudda's comment came up. i really dont know how github works sorry