Hi,

I wanted to create my own Minecraft Modpack Server, but I got this message plenty of times:

Spoiler

---- Minecraft Crash Report ----

WARNING: coremods are present:
  CCLCorePlugin (CodeChickenLib-1.8-1.1.2.115-universal.jar)
  BetterFoliageLoader (BetterFoliage-MC1.8-2.0.7.jar)
  CCCDeobfPlugin (unknown)
  CodeChickenCorePlugin (CodeChickenCore-1.8-1.0.5.34-universal.jar)
  DLFMLCorePlugin (DynamicLights-1.8.jar)
  NEICorePlugin (NotEnoughItems-1.8-1.0.5.82-universal.jar)
  MovingWorldCoreMod (movingworld-MC1.8-V1.8.1.jar)
Contact their authors BEFORE contacting forge

// Hey, that tickles! Hehehe!

Time: 12.11.21 16:23
Description: Exception in server tick loop

net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
    at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:163)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:538)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:355)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:461)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:507)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 30 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@7e4204e2 from coremod FMLCorePlugin
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234)
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
    ... 32 more
Caused by: java.lang.RuntimeException: Attempted to load class cen for invalid side SERVER
    at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:49)
    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230)
    ... 34 more

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

-- System Details --
Details:
    Minecraft Version: 1.8
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_311, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 3305717480 bytes (3152 MB) / 4116185088 bytes (3925 MB) up to 4116185088 bytes (3925 MB)
    JVM Flags: 2 total; -Xms4G -Xmx4G
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.4.1563 30 mods loaded, 30 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UC    mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
    UC    FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.4.1563-universal.jar) 
    UC    Forge{11.14.4.1563} [Minecraft Forge] (forge-1.8-11.14.4.1563-universal.jar) 
    UC    CodeChickenCore{1.0.5.34} [CodeChicken Core] (minecraft.jar) 
    UC    NotEnoughItems{1.0.5.82} [Not Enough Items] (NotEnoughItems-1.8-1.0.5.82-universal.jar) 
    UC    darkevilmac.movingworld.common.asm.coremod{} [MovingWorld CORE] (minecraft.jar) 
    UC    rockcandy{1.0} [Rock Candy Mod by Dralard] (1.8.0_Rock_Candy_Mod_1.1.2_by_Dralard.jar) 
    UC    MovingWorld{MC1.8-V1.8.1} [Moving World] (movingworld-MC1.8-V1.8.1.jar) 
    UC    ArchimedesShipsPlus{MC1.8-V1.8} [Archimedes' Ships Plus] (archimedesshipsplus-MC1.8-V1.8.jar) 
    UC    ArmorPlus{1.5.3} [ArmorPlus] (ArmorPlus-1.5.3(1.8).jar) 
    UC    armourexpansion{1.0} [Armour Expansion] (Armour-Expansion-Mod-1.8.jar) 
    UC    BattleTowers{1.5.2} [Battle Towers] (BattleTowers-1.8.jar) 
    UC    BetterFoliage{2.0.7} [Better Foliage] (BetterFoliage-MC1.8-2.0.7.jar) 
    UC    DamageIndicatorsMod{3.3.2} [Damage Indicators] (Damage-Indicators-Mod-1.8.jar) 
    UE    DynamicLights{1.3.8} [Dynamic Lights] (DynamicLights-1.8.jar) 
    UE    DynamicLights_onFire{1.0.4} [Dynamic Lights Burning Entity Module] (DynamicLights-1.8.jar) 
    UE    DynamicLights_creepers{1.0.4} [Dynamic Lights Creeper Module] (DynamicLights-1.8.jar) 
    UE    DynamicLights_dropItems{1.0.8} [Dynamic Lights EntityItem Module] (DynamicLights-1.8.jar) 
    UE    DynamicLights_entityClasses{1.0.1} [Dynamic Lights Entity Light Module] (DynamicLights-1.8.jar) 
    UE    DynamicLights_mobEquipment{1.0.8} [Dynamic Lights Mob Equipment Light Module] (DynamicLights-1.8.jar) 
    UE    DynamicLights_flameArrows{1.0.0} [Dynamic Lights Fiery Arrows Light Module] (DynamicLights-1.8.jar) 
    UE    DynamicLights_floodLights{1.0.2} [Dynamic Lights Flood Light] (DynamicLights-1.8.jar) 
    UE    DynamicLights_otherPlayers{1.0.7} [Dynamic Lights OtherPlayers Light Module] (DynamicLights-1.8.jar) 
    UE    DynamicLights_thePlayer{1.1.3} [Dynamic Lights Player Light Module] (DynamicLights-1.8.jar) 
    UC    gvc{0.6.1} [§aGliby's§f Voice Chat Mod] (GlibysVC-1.8-0.6.1.jar) 
    UC    lootplusplus{1.6_for_1.8} [Loot++] (Loot++-1.6_for_1.8.jar) 
    UC    lucky{7.0.1} [Lucky Block] (LuckyBlock_1-8_v7-0-1.zip) 
    UC    mopickaxes{630} [Mo' Pickaxes] (More-Pickaxes-Mod-1.8.jar) 
    UC    Roguelike{1.4.4} [Roguelike Dungeons] (RoguelikeDungeons-1.8-1.4.4.jar) 
    UE    mymod{1.1} [Swords++] (Swords++ v1.1 [1.8].jar) 
    Loaded coremods (and transformers): 
CCLCorePlugin (CodeChickenLib-1.8-1.1.2.115-universal.jar)
  codechicken.lib.asm.ClassHeirachyManager
  codechicken.lib.asm.RenderHookTransformer
BetterFoliageLoader (BetterFoliage-MC1.8-2.0.7.jar)
  mods.betterfoliage.loader.BetterFoliageTransformer
CCCDeobfPlugin (unknown)
  
CodeChickenCorePlugin (CodeChickenCore-1.8-1.0.5.34-universal.jar)
  codechicken.core.asm.InterfaceDependancyTransformer
  codechicken.core.asm.TweakTransformer
  codechicken.core.asm.DelegatedTransformer
  codechicken.core.asm.DefaultImplementationTransformer
DLFMLCorePlugin (DynamicLights-1.8.jar)
  atomicstryker.dynamiclights.common.DLTransformer
NEICorePlugin (NotEnoughItems-1.8-1.0.5.82-universal.jar)
  codechicken.nei.asm.NEITransformer
MovingWorldCoreMod (movingworld-MC1.8-V1.8.1.jar)
  
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

 

1.8 is no longer supported on this forum.
Please update to a modern version of Minecraft to receive support.