please help
[09:16:21] [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_241] at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_241] at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:539) ~[magma.jar:264f337] at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source) ~[?:?] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_241] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_241] 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$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) ~[minecraft_server.1.12.2.jar:?] at com.google.common.eventbus.EventBus.post(EventBus.java:217) ~[minecraft_server.1.12.2.jar:?] at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219) ~[magma.jar:264f337] at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197) ~[magma.jar:264f337] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_241] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_241] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_241] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_241] at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) ~[minecraft_server.1.12.2.jar:?] at com.google.common.eventbus.Subscriber$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:264f337] at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:565) ~[Loader.class:264f337] at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:102) ~[FMLServerHandler.class:264f337] at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:335) ~[FMLCommonHandler.class:264f337] at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:169) ~[nz.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:672) [MinecraftServer.class:?] at java.lang.Thread.run(Unknown Source) [?:1.8.0_241] 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_241] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241] ... 33 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_241] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241] ... 33 more [09:17:40] [Server thread/ERROR] [minecraft/MinecraftServer]: This crash report has been saved to: C:\Users\xxsay\OneDrive\Escritorio\Minikarmaland\.\crash-reports\crash-2020-04-18_09.17.40-server.txt [09:17:40] [Server thread/INFO] [minecraft/MinecraftServer]: Stopping server [09:17:40] [Server thread/INFO] [minecraft/MinecraftServer]: Saving worlds [09:17:41] [Server thread/INFO] [FML]: The state engine was in incorrect state PREINITIALIZATION and forced into state SERVER_STOPPED. Errors may have been discarded.
