포지 버킷에 데코크래프트 모드만 넣으면 다음과 같이 뜨는데 혹시 고칠 수 있을까요? 버킷으로 데코크래프트를 열고싶습니다.

[09:53:52] [Server thread/ERROR] [minecraft/MinecraftServer]: Encountered an unexpected exception

java.lang.NoClassDefFoundError: com/mia/craftstudio/IPackReaderCallback

        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_311]

        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_311]

        at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:539) ~[forge-1.12.2-14.23.5.2860.jar:?]

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_311]

        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_311]

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_311]

        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_311]

        at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.EventBus.post(EventBus.java:217) ~[minecraft_server.1.12.2.jar:?]

        at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219) ~[LoadController.class:?]

        at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197) ~[LoadController.class:?]

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_311]

        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_311]

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_311]

        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_311]

        at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) ~[minecraft_server.1.12.2.jar:?]

        at com.google.common.eventbus.EventBus.post(EventBus.java:217) ~[minecraft_server.1.12.2.jar:?]

        at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136) ~[LoadController.class:?]

        at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:595) ~[Loader.class:?]

        at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:98) ~[FMLServerHandler.class:?]

        at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333) ~[FMLCommonHandler.class:?]

        at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125) ~[nz.class:?]

        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486) [MinecraftServer.class:?]

        at java.lang.Thread.run(Unknown Source) [?:1.8.0_311]

Caused by: java.lang.ClassNotFoundException: com.mia.craftstudio.IPackReaderCallback

        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]

        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_311]

        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_311]

        ... 34 more

Caused by: java.lang.NullPointerException

        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.12.jar:?]

        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_311]

        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_311]

        ... 34 more