Please help, My forge server isn't working

[Condev]

I added the 1.12.2 mods and thats what made it stop working, just crashes when i run it.

Here's the crash report.

WARNING: coremods are present:
  weaponlib (mw_2.0-0.4.4.6_mc1.12.2.jar)
Contact their authors BEFORE contacting forge

Time: 5/13/22 6:14 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: com/mia/craftstudio/IPackReaderCallback
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:534)
    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:498)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:215)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:193)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:132)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:610)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:101)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:331)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:167)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:590)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: com.mia.craftstudio.IPackReaderCallback
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    ... 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:
    Mohist version: 1.12.2-321
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_252, AdoptOpenJDK
    Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), AdoptOpenJDK
    Memory: 545745312 bytes (520 MB) / 825753600 bytes (787 MB) up to 8589934592 bytes (8192 MB)
    JVM Flags: 1 total; -Xmx9G
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    CraftBukkit Information: 
   Running: 
   Failed to handle CraftCrashReport: craftbukkit not runs

    FML: MCP 9.42 Powered by Forge 14.23.5.2860 14 mods loaded, 14 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State | ID            | Version           | Source                                           | Signature |
    |:----- |:------------- |:----------------- |:------------------------------------------------ |:--------- |
    | LC    | minecraft     | 1.12.2            | minecraft.jar                                    | None      |
    | LC    | mcp           | 9.42              | minecraft.jar                                    | None      |
    | LC    | mohist        | 1.12.2-321        | mohist.jar                                       | None      |
    | LC    | FML           | 8.0.99.99         | mohist.jar                                       | None      |
    | LC    | forge         | 14.23.5.2860      | mohist.jar                                       | None      |
    | LC    | atomicscience | 1.12.2-3.0.6.19   | Atomic-Science-1.12.2-3.0.6b19.jar               | None      |
    | L     | props         | 2.6.3.7           | Decocraft-2.6.3.7_1.12.2.jar                     | None      |
    | L     | hbm           | hbm-1.6.5A-1.12.2 | hbm-1.6.5a-G.jar                                 | None      |
    | L     | mts           | 21.2.0            | Immersive+Vehicles-1.12.2-21.2.0.jar             | None      |
    | L     | jei           | 4.16.1.301        | jei_1.12.2-4.16.1.301.jar                        | None      |
    | L     | mw            | 0.4.4.6           | mw_2.0-0.4.4.6_mc1.12.2.jar                      | None      |
    | L     | unuparts      | 5.1.2             | UNU+Parts+Pack+[MTS]+1.12.2-21.1.0-5.1.2.jar     | None      |
    | L     | unucivil      | 5.3.0             | UNU+Civilian+Pack+[MTS]+1.12.2-21.1.0-5.3.0.jar  | None      |
    | L     | unumilitary   | 4.0.2             | UNU+Military+Pack+[MTS]+1.12.2-19.15.5-4.0.2.jar | None      |

    Loaded coremods (and transformers): 
weaponlib (mw_2.0-0.4.4.6_mc1.12.2.jar)
  com.vicmatskiv.weaponlib.core.WeaponlibClassTransformer
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'Mohist'
    Type: Dedicated Server (map_server.txt)