Server Crashes On Startup

[Jarst4r]

I'm trying to run a server with a custom modpack, but it closes whenever I try to open it. Here is the crash report:

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 6/01/18 4:33 PM
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderException: java.lang.NoSuchMethodError: net.minecraft.item.Item.func_77640_w()Lnet/minecraft/creativetab/CreativeTabs;
    at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
    at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:559)
    at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:88)
    at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:314)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
    at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
Caused by: java.lang.NoSuchMethodError: net.minecraft.item.Item.func_77640_w()Lnet/minecraft/creativetab/CreativeTabs;
    at com.deltageek.rottenflesh.item.UncuredFlesh.<init>(UncuredFlesh.java:8)
    at com.deltageek.rottenflesh.init.ModItems.<clinit>(ModItems.java:7)
    at com.deltageek.rottenflesh.RottenFleshToLeather.preInit(RottenFleshToLeather.java:35)
    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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:532)
    at sun.reflect.GeneratedMethodAccessor3.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 cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
    at cpw.mods.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 cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
    at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:556)
    ... 5 more

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

-- System Details --
Details:
    Minecraft Version: 1.7.10
    Operating System: Windows 8.1 (amd64) version 6.3
    Java Version: 1.8.0_151, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 954839008 bytes (910 MB) / 1307574272 bytes (1247 MB) up to 1908932608 bytes (1820 MB)
    JVM Flags: 3 total; -Xmx2G -Xms1G -XX:MaxPermSize=128m
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1492 45 mods loaded, 45 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UCH    mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
    UCH    FML{7.10.99.99} [Forge Mod Loader] (YeOldeMedievalPacke.jar) 
    UCH    Forge{10.13.4.1492} [Minecraft Forge] (YeOldeMedievalPacke.jar) 
    UCH    CodeChickenCore{1.0.4.29} [CodeChicken Core] (minecraft.jar) 
    UCH    ThaumicTinkerer-preloader{0.1} [Thaumic Tinkerer Core] (minecraft.jar) 
    UCH    VeinMiner_coremod{0.26.0_build.unknown} [Core mod] (minecraft.jar) 
    UCH    OpenModsCore{0.6} [OpenModsCore] (minecraft.jar) 
    UCH    <CoFH ASM>{000} [CoFH ASM] (minecraft.jar) 
    UCH    battlegear2{1.7.10} [Mine & Blade Battlegear 2 - Bullseye] (1.7.10-MB_Battlegear2-Bullseye-1.0.8.0.jar) 
    UCH    AnimationAPI{1.2.4} [AnimationAPI] (AnimationAPI-1.7.10-1.2.4.jar) 
    UCH    arsmagica2{1.4.0.005} [Ars Magica 2] (AM2-1.4.0.006.jar) 
    UCH    CoFHCore{1.7.10R3.1.4} [CoFH Core] (CoFHCore-[1.7.10]3.1.4-329.jar) 
    UCH    AncientWarfare{2.4.83-beta-MC1.7.10} [Ancient Warfare Core] (ancientwarfare-2.4.83-beta-MC1.7.10.jar) 
    UCH    AncientWarfareAutomation{2.4.83-beta-MC1.7.10} [Ancient Warfare Automation] (ancientwarfare-2.4.83-beta-MC1.7.10.jar) 
    UCH    AncientWarfareNEIPlugin{2.4.83-beta-MC1.7.10} [Ancient Warfare NEI Plugin] (ancientwarfare-2.4.83-beta-MC1.7.10.jar) 
    UCH    AncientWarfareNpc{2.4.83-beta-MC1.7.10} [Ancient Warfare NPCs] (ancientwarfare-2.4.83-beta-MC1.7.10.jar) 
    UCH    AncientWarfareStructure{2.4.83-beta-MC1.7.10} [Ancient Warfare Structures] (ancientwarfare-2.4.83-beta-MC1.7.10.jar) 
    UCH    AncientWarfareVehicle{2.4.83-beta-MC1.7.10} [Ancient Warfare Vehicles] (ancientwarfare-2.4.83-beta-MC1.7.10.jar) 
    UCH    AppleCore{1.3.2} [AppleCore] (AppleCore-mc1.7.10-1.3.2.jar) 
    UCH    ArchimedesShips{1.7.10 v1.7.1} [Archimedes' Ships] (ArchimedesShips-1.7.1.jar) 
    UCH    Backpack{2.0.1} [Backpack] (backpack-2.0.1-1.7.x.jar) 
    UCH    BiblioCraft{1.9.2} [BiblioCraft] (BiblioCraft[v1.9.2][MC1.7.10].jar) 
    UCH    CarpentersBlocks{3.3.4.2} [Carpenter's Blocks] (Carpenter's Blocks v3.3.4.2 - MC 1.7.10.jar) 
    UCH    Baubles{1.0.1.10} [Baubles] (Baubles-1.7.10-1.0.1.10.jar) 
    UCH    Thaumcraft{4.2.3.3} [Thaumcraft] (Thaumcraft-1.7.10-4.2.3.3.jar) 
    UCH    chisel{2.3.10.37} [Chisel 2] (Chisel2-2.3.10.37.jar) 
    UCH    CraftHeraldry{1.1.3} [CraftHeraldry] (CraftHeraldry-Mod-1.7.10.jar) 
    UCH    Mantle{1.7.10-0.3.2.jenkins191} [Mantle] (Mantle-1.7.10-0.3.2b.jar) 
    UCH    ThermalFoundation{1.7.10R1.2.6} [Thermal Foundation] (ThermalFoundation-[1.7.10]1.2.6-118.jar) 
    UCH    TConstruct{1.7.10-1.8.7.build979} [Tinkers' Construct] (TConstruct-1.7.10-1.8.7.jar) 
    UCH    ExtraUtilities{1.2.6} [Extra Utilities] (extrautilities-1.2.6.jar) 
    UCH    magicalcrops{1.7.2 - 0.1 ALPHA} [Magical Crops] (magicalcrops-1.7.10_0.1.jar) 
    UCH    radixcore{1.3.4} [RadixCore] (RadixCore-1.7.10-1.3.4-universal.jar) 
    UCH    mca{4.1.5} [Minecraft Comes Alive] (MCA-1.7.10-4.1.5-universal.jar) 
    UCH    OpenMods{0.6} [OpenMods] (OpenModsLib-1.7.10-0.6.jar) 
    UCH    OpenBlocks{1.3} [OpenBlocks] (OpenBlocks-1.7.10-1.3.jar) 
    UCH    ProjectE{1.7.10-PE1.9.5} [ProjectE] (ProjectE-1.7.10-PE1.9.5.jar) 
    UCE    RottenFleshToLeather{1.7.10-2.0} [Rotten Flesh to Leather] (RottenFleshToLeather-2.1-1.7.10.jar) 
    UCH    ThaumicTinkerer{unspecified} [Thaumic Tinkerer] (ThaumicTinkerer-2.5-1.7.10-164.jar) 
    UCH    TiCTooltips{1.2.5} [TiC Tooltips] (TiCTooltips-mc1.7.10-1.2.5-client.jar) 
    UCH    TMechworks{0.2.14.100} [Tinkers' Mechworks] (TMechworks-1.7.10-0.2.14.100.jar) 
    UCH    VeinMiner{0.26.0_build.unknown} [Vein Miner] (Vein-Miner-Mod-1.7.10.jar) 
    UCH    VeinMinerModSupport{0.26.0_build.unknown} [Mod Support] (Vein-Miner-Mod-1.7.10.jar) 
    UCH    weaponmod{v1.14.3} [Balkon's WeaponMod] (weaponmod-1.14.3.jar) 
    UCH    witchery{0.22.0} [Witchery] (witchery-1.7.10-0.22.0.jar) 
    OpenModsLib crash transformers: [stencil_patches:ENABLED],[movement_callback:ENABLED],[map_gen_fix:ENABLED],[gl_capabilities_hook:ENABLED],[player_render_hook:ENABLED]
    CoFHCore: -[1.7.10]3.1.4-329
    Mantle Environment: Environment healthy.
    ThermalFoundation: -[1.7.10]1.2.6-118
    TConstruct Environment: Environment healthy.
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

 

Many thanks if you can help.

[Pepperjack_exa]

Rotten Flesh to Leather mod is giving you issues maybe does it run if you remove that mod?