June 19, 2025Jun 19 Hello, i've tried to make a minecraft server for my friends on old laptop. But im getting this error  ---- Minecraft Crash Report ---- WARNING: coremods are present:  DCLoadingPlugin (DummyCoreUnofficial-2.4.112.3.jar)  HCASM (HammerLib-1.12.2-2.0.6.23.jar) Contact their authors BEFORE contacting forge // I feel sad now Time: 19.06.25 22:26 Description: Exception in server tick loop java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft    at nukeduck.armorchroma.ArmorChroma.<clinit>(ArmorChroma.java:23)    at java.lang.Class.forName0(Native Method)    at java.lang.Class.forName(Class.java:348)    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:539)    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$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)    at com.google.common.eventbus.EventBus.post(EventBus.java:217)    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219)    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:498)    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)    at com.google.common.eventbus.Subscriber$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$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)    at com.google.common.eventbus.EventBus.post(EventBus.java:217)    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136)    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:595)    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:98)    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333)    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125)    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)    at java.lang.Thread.run(Thread.java:750) Caused by: java.lang.ClassNotFoundException: net.minecraft.client.Minecraft    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)    ... 35 more Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@57fae983 from coremod FMLCorePlugin    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260)    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)    ... 37 more Caused by: java.lang.RuntimeException: Attempted to load class bib for invalid side SERVER    at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:62)    at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256)    ... 39 more A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details:    Minecraft Version: 1.12.2    Operating System: Linux (amd64) version 6.8.0-51-generic    Java Version: 1.8.0_452, Private Build    Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Private Build    Memory: 1088926088 bytes (1038 MB) / 1634205696 bytes (1558 MB) up to 4194304000 bytes (4000 MB)    JVM Flags: 2 total; -Xms1024M -Xmx4500M    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0    FML: MCP 9.42 Powered by Forge 14.23.5.2859 44 mods loaded, 44 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   | FML            | 8.0.99.99      | forge-1.12.2-14.23.5.2859.jar         | e3c3d50c7c986df74c645c0ac54639741c90a557 |    | LC   | forge           | 14.23.5.2859    | forge-1.12.2-14.23.5.2859.jar         | e3c3d50c7c986df74c645c0ac54639741c90a557 |    | LC   | codechickenlib      | 3.2.3.358      | CodeChickenLib-1.12.2-3.2.3.358-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |    | LC   | ancientwarfare      | 1.12.2-2.7.0.1032  | ancientwarfare-1.12.2-2.7.0.1032.jar      | None                   |    | LC   | ancientwarfareautomation | 1.12.2-2.7.0.1032  | ancientwarfare-1.12.2-2.7.0.1032.jar      | None                   |    | LC   | ancientwarfarenpc     | 1.12.2-2.7.0.1032  | ancientwarfare-1.12.2-2.7.0.1032.jar      | None                   |    | LC   | ancientwarfarestructure  | 1.12.2-2.7.0.1032  | ancientwarfare-1.12.2-2.7.0.1032.jar      | None                   |    | LC   | ancientwarfarevehicle   | 1.12.2-2.7.0.1032  | ancientwarfare-1.12.2-2.7.0.1032.jar      | None                   |    | L   | armorchroma        | 1.4-beta      | armorchroma-1.12.2-1.4.jar           | None                   |    | L   | baubles          | 1.5.2        | Baubles-1.12-1.5.2.jar             | None                   |    | L   | betterburning       | 0.9.2        | BetterBurning-1.12.2-0.9.2.jar         | None                   |    | L   | bettercaves        | 1.12.2       | bettercaves-1.12.2-2.0.4.jar          | None                   |    | L   | betterinvisibility    | 1.0.1        | betterinvisibility-1.0.1.jar          | None                   |    | L   | bettermineshafts     | 1.12.2-2.2     | BetterMineshaftsForge-1.12.2-2.2.jar      | None                   |    | L   | bookshelf         | 2.3.590       | Bookshelf-1.12.2-2.3.590.jar          | None                   |    | L   | collective        | 2.11        | collective-1.12.2-2.11.jar           | None                   |    | L   | extendedrenderer     | v1.0        | coroutil-1.12.1-1.2.37.jar           | None                   |    | L   | coroutil         | 1.12.1-1.2.37    | coroutil-1.12.1-1.2.37.jar           | None                   |    | L   | configmod         | v1.0        | coroutil-1.12.1-1.2.37.jar           | None                   |    | L   | dummycore         | 2.4.112.3.     | DummyCoreUnofficial-2.4.112.3.jar       | None                   |    | L   | dynamictrees       | 1.12.2-0.9.22    | DynamicTrees-1.12.2-0.9.22.jar         | None                   |    | L   | thaumcraft        | 6.1.BETA26     | Thaumcraft_1.12.2_6.1.BETA26.jar        | None                   |    | L   | dynamictreestc      | 1.12.2-1.4.2    | DynamicTreesTC-1.12.2-1.4.2.jar        | None                   |    | L   | hammercore        | 2.0.6.23      | HammerLib-1.12.2-2.0.6.23.jar         | None                   |    | L   | waila           | 1.8.26       | Hwyla-1.8.26-B41_1.12.2.jar          | None                   |    | L   | jei            | 4.16.1.302     | jei_1.12.2-4.16.1.302.jar           | None                   |    | L   | keepinginventory     | 2.4         | KeepingInventory-1.12.2-2.4.jar        | None                   |    | L   | libraryex         | 1.2.1        | LibraryEx-1.12.2-1.2.1.jar           | None                   |    | L   | netherex         | 2.2.4        | NetherEx-1.12.2-2.2.4.jar           | None                   |    | L   | recipehandler       | 0.13        | NoMoreRecipeConflict-0.13(1.12.2).jar     | None                   |    | L   | nei            | 2.4.3        | NotEnoughItems-1.12.2-2.4.3.245-universal.jar | None                   |    | L   | thaumadditions      | 12.6.6       | ThaumicAdditions-1.12.2-12.6.6.jar       | None                   |    | L   | thaumicbases       | 3.3.500.6r     | thaumicbases-3.3.500.6r.jar          | None                   |    | L   | thaumictinkerer      | 1.12.2-5.0-620a0c5 | thaumictinkerer-1.12.2-5.0-620a0c5.jar     | None                   |    | L   | thaumicwaila       | 1.12.2-0.0.2    | ThaumicWaila-1.12.2-0.0.2.jar         | None                   |    | L   | tumbleweed        | 1.12-0.4.7     | tumbleweed-1.12-0.4.7.jar           | None                   |    | L   | villagespawnpoint     | 1.5         | villagespawnpoint_1.12.2-1.5.jar        | None                   |    | L   | wawla           | 2.6.275       | Wawla-1.12.2-2.6.275.jar            | None                   |    | L   | wooltostring       | 1.12.2       | WoolToString-1.12.2-1.0.0.jar         | None                   |    | L   | zombieawareness      | 1.12.1-1.11.16   | zombieawareness-1.12.1-1.11.16.jar       | None                   |    | L   | betteranimalsplus     | 9.0.1        | betteranimalsplus-1.12.2-9.0.1.jar       | None                   |    | L   | orelib          | 3.6.0.1       | OreLib-1.12.2-3.6.0.1.jar           | None                   |    Loaded coremods (and transformers): DCLoadingPlugin (DummyCoreUnofficial-2.4.112.3.jar)  DummyCore.ASM.DCASMManager HCASM (HammerLib-1.12.2-2.0.6.23.jar)  com.zeitheron.hammercore.asm.HammerCoreTransformer    Profiler Position: N/A (disabled)    Is Modded: Definitely; Server brand changed to 'fml,forge'    Type: Dedicated Server (map_server.txt) Edited June 19, 2025Jun 19 by LinuxShetter
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