Das ist die Fehlermeldung:

Version: 273254, IsEditor: No, IsPerforceBuild: No, BuildConfiguration: Shipping, Launcher: Steam, NetMode: Client, IsUsingMods: Yes, IsSaveGameEdited: No

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffffffffffff

FactoryGame_SignificanceManager_Win64_Shipping!USignificanceManager::FManagedObjectInfo::UpdateSignificance() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Plugins\Runtime\SignificanceManager\Source\SignificanceManager\Private\SignificanceManager.cpp:463]
FactoryGame_SignificanceManager_Win64_Shipping!`ParallelForImpl::ParallelForInternal<TFunctionRef<void __cdecl(int)>,<lambda_600b85aa2a81f4761389a82b02631227>,std::nullptr_t>'::`2'::FParallelExecutor::operator()() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Public\Async\ParallelFor.h:334]
FactoryGame_SignificanceManager_Win64_Shipping!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask * __cdecl(bool),48>::TTaskDelegateImpl<<lambda_6270a3d3cb9373e2bb024e43bd799761>,0>::CallAndMove() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Public\Async\Fundamental\TaskDelegate.h:171]
FactoryGame_Core_Win64_Shipping!LowLevelTasks::FTask::ExecuteTask() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Public\Async\Fundamental\Task.h:627]
FactoryGame_Core_Win64_Shipping!LowLevelTasks::FScheduler::TryExecuteTaskFrom<LowLevelTasks::TLocalQueueRegistry<1024>::TLocalQueue,&LowLevelTasks::TLocalQueueRegistry<1024>::TLocalQueue::DequeueGlobal,0>() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:349]
FactoryGame_Core_Win64_Shipping!LowLevelTasks::FScheduler::WorkerMain() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:378]
FactoryGame_Core_Win64_Shipping!UE::Core::Private::Function::TFunctionRefCaller<<lambda_abf63b4b71b3a09b60c8feab122cedbd>,void __cdecl(void)>::Call() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Public\Templates\Function.h:475]
FactoryGame_Core_Win64_Shipping!FThreadImpl::Run() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Private\HAL\Thread.cpp:69]
FactoryGame_Core_Win64_Shipping!FRunnableThreadWin::Run() [C:\BuildAgent\work\607eee041ab2bfcf\UE4\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:149]

Ich habe ein Minecraft Plugin selbst programmiert aber jetzt wird diese Fehlermeldung angezeigt:

[08:53:05] [Server thread/ERROR]: Could not load 'plugins\EasyConvert+1.0.0.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `easytrade.thepixel3261.easytrade.EasyTrade'
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:69) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:145) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:394) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:301) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.craftbukkit.v1_20_R1.CraftServer.loadPlugins(CraftServer.java:435) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
    at net.minecraft.server.dedicated.DedicatedServer.e(DedicatedServer.java:219) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:972) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
    at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:303) ~[spigot-1.20.1-R0.1-SNAPSHOT.jar:3871-Spigot-d2eba2c-3f9263b]
    at java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: easytrade.thepixel3261.easytrade.EasyTrade
    at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:147) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:99) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
    at java.lang.Class.forName0(Native Method) ~[?:?]
    at java.lang.Class.forName(Class.java:534) ~[?:?]
    at java.lang.Class.forName(Class.java:513) ~[?:?]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:67) ~[spigot-api-1.20.1-R0.1-SNAPSHOT.jar:?]
    ... 8 more

Als Server Software benutze ich Spigot. Das ist der Code der Main.java Datei:

package easytrade.thepixel3261.easytrade;

import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin {

    @Override
    public void onEnable() {
        getLogger().info("Plugin enabled!");
    }

    @Override
    public void onDisable() {
        getLogger().info("Plugin disabled!");
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (cmd.getName().equalsIgnoreCase("convert")) {
            if (!(sender instanceof Player)) {
                sender.sendMessage("Only players can use this command.");
                return true;
            }

            Player player = (Player) sender;

            if (args.length != 2) {
                player.sendMessage("Usage: /convert <material> <amount>");
                return true;
            }

            Material fromMaterial = Material.getMaterial(args[0].toUpperCase());
            int amount = Integer.parseInt(args[1]);

            if (fromMaterial == null) {
                player.sendMessage("Invalid material specified.");
                return true;
            }

            Material toMaterial = null;

            if (fromMaterial == Material.COPPER_INGOT && amount >= 2) {
                toMaterial = Material.EMERALD;
                amount /= 2;
            } else if (fromMaterial == Material.EMERALD && amount >= 1) {
                toMaterial = Material.COPPER_INGOT;
                amount *= 2;
            } else {
                player.sendMessage("Invalid material specified or not enough items.");
                return true;
            }

            ItemStack fromItem = new ItemStack(fromMaterial, amount);

            if (!player.getInventory().containsAtLeast(fromItem, amount)) {
                player.sendMessage("You do not have enough " + fromMaterial.toString().toLowerCase() + "s in your inventory.");
                return true;
            }

            ItemStack toItem = new ItemStack(toMaterial, amount);

            // Remove the specified number of items from the player's inventory
            player.getInventory().removeItem(fromItem);

            // Add the converted items to the player's inventory
            player.getInventory().addItem(toItem);

            player.sendMessage("Successfully converted " + amount + " " + fromMaterial.toString().toLowerCase() + "s to " + amount + " " + toMaterial.toString().toLowerCase() + "s.");

            return true;
        }

        return false;
    }
}