Error :

The game crashed whilst there was a severe problem during mod loading that has caused the game to fail
Error: cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: modconfig/IConfigCategory

 

Log :  

 

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 6/22/19 1:50 AM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: modconfig/IConfigCategory
    at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:544)
    at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:208)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    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.NoClassDefFoundError: modconfig/IConfigCategory
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:440)
    at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    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(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    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.loadMods(Loader.java:513)
    ... 10 more
Caused by: java.lang.ClassNotFoundException: modconfig.IConfigCategory
    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)
    ... 34 more
Caused by: java.lang.NullPointerException
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
    ... 36 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_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1423010112 bytes (1357 MB) / 2214592512 bytes (2112 MB) up to 8589934592 bytes (8192 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx8G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    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 10.13.4.1614 25 mods loaded, 25 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{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10.jar) 
    UC    Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10.jar) 
    UC    CodeChickenCore{1.0.7.47} [CodeChicken Core] (minecraft.jar) 
    UC    TooManyItems{1.7.10} [TooManyItems] (minecraft.jar) 
    UC    legends{1.3.3} [Legends Mod] (1Legends-1.7.10-1.3.3.jar) 
    UC    legendshorror{1.0} [Legends: Horror] (1Legends-1.7.10-1.3.3.jar) 
    UC    legendskaiju{1.0} [Legends: Kaiju] (1Legends-1.7.10-1.3.3.jar) 
    UC    legendsstarwars{1.0} [Legends: Star Wars] (1Legends-1.7.10-1.3.3.jar) 
    UC    sum{6.0} [Legends: Superheroes Unlimited] (1Legends-1.7.10-1.3.3.jar) 
    UC    securitycraft{v1.8.12} [SecurityCraft] ([1.7.10]+SecurityCraft+v1.8.12.jar) 
    UC    BiomesOPlenty{2.1.0} [Biomes O' Plenty] (BiomesOPlenty-1.7.10-2.1.0.2308-universal.jar) 
    UC    blocklings{3.0.3} [Blocklings] (Blocklings-Mod-1.7.10.jar) 
    UC    DamageIndicatorsMod{3.3.2} [Damage Indicators] (Damage-Indicators-Mod-1.7.10.jar) 
    UC    dynamictrees{1.7.10-0.7.2b} [Dynamic Trees] (DynamicTrees-1.7.10-0.7.2b.jar) 
    UC    thutcore{2.0} [ThutCore] (Elevators-mod-by-thutmose-1.7.10.jar) 
    UC    ThutConcrete{2.0.0} [Thut's Concrete] (Elevators-mod-by-thutmose-1.7.10.jar) 
    UC    ThutTech{2.0.0} [Thut's Tech] (Elevators-mod-by-thutmose-1.7.10.jar) 
    UC    ForgeMultipart{1.2.0.345} [Forge Multipart] (ForgeMultipart-1.7.10-1.2.0.345-universal.jar) 
    UC    McMultipart{1.2.0.345} [Minecraft Multipart Plugin] (ForgeMultipart-1.7.10-1.2.0.345-universal.jar) 
    UC    framesplus{2.0} [Frames+] (Frames+ 2.0 BETA Build 14 [1.7.10].jar) 
    UC    IronChest{6.0.62.742} [Iron Chest] (ironchest-1.7.10-6.0.62.742-universal.jar) 
    UC    OreSpawn{1.7.10.20.3} [OreSpawn] (Ore-Spawn-Mod-1.7.10.zip) 
    UE    weather2{v2.3.19} [Localized Weather & Storms] (weather2-1.7.10-2.3.20.jar) 
    UC    ForgeMicroblock{1.2.0.345} [Forge Microblocks] (ForgeMultipart-1.7.10-1.2.0.345-universal.jar) 
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 399.07' Renderer: 'GeForce GTX 1060 3GB/PCIe/SSE2'

try to take out weather2 from your modpack

Sorry we don't support 1.7.10 (it's 4+ years old!) or any version under 1.10 on this forum anymore due to their age. We simply don't know how to help you anymore. You can go to the Minecraft Forum where I think that they still still support older versions, or update to a modern version of Minecraft (the latest version or the one before it) to receive support on this forum.