Crash on modpack server

[RedstoneMaster22]

Hi, so I am having this crash that I do not know how to fix, any help would be appriciated!

Crash report:

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 6/7/16 9:05 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiScreen
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.getConstructor(Unknown Source)
    at net.minecraft.world.SpawnerAnimals.func_77191_a(SpawnerAnimals.java:260)
    at net.minecraft.world.gen.ChunkProviderGenerate.func_73153_a(ChunkProviderGenerate.java:424)
    at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:279)
    at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1055)
    at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
    at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
    at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
    at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:265)
    at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:235)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:258)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
    at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.gui.GuiScreen
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 16 more
Caused by: java.lang.RuntimeException: Attempted to load class bdw for invalid side SERVER
    at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
    ... 18 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 10 (amd64) version 10.0
    Java Version: 1.8.0_92, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 641341760 bytes (611 MB) / 1259864064 bytes (1201 MB) up to 1905262592 bytes (1817 MB)
    JVM Flags: 0 total; 
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
    FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1614 42 mods loaded, 42 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UCHIJAA    mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
    UCHIJAA    FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10-universal.jar) 
    UCHIJAA    Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10-universal.jar) 
    UCHIJAA    AM2-Preloader{0.0.3} [AMCore] (minecraft.jar) 
    UCHIJAA    CodeChickenCore{1.0.7.46} [CodeChicken Core] (minecraft.jar) 
    UCHIJAA    Micdoodlecore{} [Micdoodle8 Core] (minecraft.jar) 
    UCHIJAA    NotEnoughItems{1.0.5.110} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.110-universal (2).jar) 
    UCHIJAA    ThaumicTinkerer-preloader{0.1} [Thaumic Tinkerer Core] (minecraft.jar) 
    UCHIJAA    <CoFH ASM>{000} [CoFH ASM] (minecraft.jar) 
    UCHIJAA    Doca{1.7.10_2.2.8} [DogCatPlus] (%5B1.7.10%5D DogCatPlus-1.7.2_2.2.8.jar) 
    UCHIJAA    AnimationAPI{1.2.4} [AnimationAPI] (AnimationAPI-1.7.10-1.2.4 (1).jar) 
    UCHIJAA    arsmagica2{1.4.0.009} [Ars Magica 2] (1.7.10_AM2-1.4.0.009.jar) 
    UCHIJAA    abm{0.3.2} [Anime Battle Mod] (ABM 0.3.2 for 1.7.10.jar) 
    UCHIJAA    BiblioCraft{1.11.4} [BiblioCraft] (BiblioCraft[v1.11.4][MC1.7.10] (1).jar) 
    UCHIJAA    AWWayofTime{v1.3.3} [Blood Magic: Alchemical Wizardry] (BloodMagic-1.7.10-1.3.3-17.jar) 
    UCHIJAA    Baubles{1.0.1.10} [Baubles] (Baubles-1.7.10-1.0.1.10.jar) 
    UCHIJAA    Thaumcraft{4.2.3.5} [Thaumcraft] (Thaumcraft-1.7.10-4.2.3.5.jar) 
    UCHIJAA    Botania{r1.8-248} [Botania] (Botania r1.8-248.jar) 
    UCHIJAA    cfm{3.4.8} [§9MrCrayfish's Furniture Mod] (cfm-3.4.8-mc1.7.10.jar) 
    UCHIJAA    CoFHCore{1.7.10R3.1.2} [CoFH Core] (CoFHCore-[1.7.10]3.1.2-325.jar) 
    UCHIJAA    CopiousDogs{${mcversion}-${version}} [Copious Dogs] (copious-dogs-1.7.10-1.1.2.jar) 
    UCHIJAA    customnpcs{1.7.10d} [CustomNpcs] (CustomNPCs_1.7.10d(21feb16).jar) 
    UCHIJAA    PTRModelLib{1.0.0} [PTRModelLib] (Decocraft-2.2.1_1.7.10.jar) 
    UCHIJAA    props{2.2.1} [Decocraft] (Decocraft-2.2.1_1.7.10.jar) 
    UCHIJAA    EnderIO{1.7.10-2.2.8.381} [Ender IO] (EnderIO-1.7.10-2.2.8.381.jar) 
    UCHIJAA    ThermalFoundation{1.7.10R1.2.3} [Thermal Foundation] (ThermalFoundation-[1.7.10]1.2.3-112.jar) 
    UCHIJAA    ExtraUtilities{1.2.0} [Extra Utilities] (extrautilities-1.2.0.jar) 
    UCHIJAA    GalacticraftCore{3.0.12} [Galacticraft Core] (GalacticraftCore-1.7-3.0.12.460.jar) 
    UCHIJAA    GalacticraftMars{3.0.12} [Galacticraft Planets] (Galacticraft-Planets-1.7-3.0.12.460.jar) 
    UCHIJAA    InventoryPets{1.4.3} [Inventory Pets] (inventorypets-1.7.10-1.4.3-universal.jar) 
    UCHIJAA    SlimevoidLib{2.0.4.7} [Slimevoid Library] (SlimevoidLibrary-2.0.4.7.jar) 
    UCHIJAA    LittleBlocks{2.2.4.4} [Little Blocks] (LittleBlocks-2.2.4.4.jar) 
    UCHIJAA    malisiscore{1.7.10-0.14.3} [MalisisCore] (malisiscore-1.7.10-0.14.3.jar) 
    UCHIJAA    malisisdoors{1.7.10-1.13.2} [Malisis' Doors] (malisisdoors-1.7.10-1.13.2.jar) 
    UCHIJAA    Mantle{1.7.10-0.3.2.jenkins184} [Mantle] (Mantle-1.7.10-0.3.2.jar) 
    UCHIJAA    harvestcraft{1.7.10j} [Pam's HarvestCraft] (Pam's HarvestCraft 1.7.10Lb.jar) 
    UCHIJAA    secretroomsmod{4.7.1} [The SecretRoomsMod] (secretroomsmod-1.7.10-4.7.1.413.jar) 
    UCHIJAA    ThermalExpansion{1.7.10R4.1.2} [Thermal Expansion] (ThermalExpansion-[1.7.10]4.1.2-240.jar) 
    UCHIJAA    TConstruct{1.7.10-1.8.3.build919} [Tinkers' Construct] (TConstruct-1.7.10-1.8.3b.jar) 
    UCHIJAA    ThaumicHorizons{1.1.9} [Thaumic Horizons] (thaumichorizons-1.7.10-1.1.9 (1).jar) 
    UCHIJAA    ThaumicTinkerer{unspecified} [Thaumic Tinkerer] (ThaumicTinkerer-2.5-1.7.10-164.jar) 
    UCHIJAA    witchery{0.24.1} [Witchery] (witchery-1.7.10-0.24.1.jar) 
    CoFHCore: -[1.7.10]3.1.2-325
    ThermalFoundation: -[1.7.10]1.2.3-112
    Mantle Environment: Environment healthy.
    ThermalExpansion: -[1.7.10]4.1.2-240
    TConstruct Environment: Environment healthy.
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Player Count: 0 / 20; []
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

[AetherPirate]

Please post a link to your modpack API and a download link for your server. 

But I bet you have client-side only mods in your server pack. 

[RedstoneMaster22]

4 minutes ago, AetherPirate said:

Please post a link to your modpack API and a download link for your server. 

But I bet you have client-side only mods in your server pack. 

I PM'd you because it is a private pack, so yeah