플러그인을 만들고 적용시켜 실행 시켰으나 Error occurred while enabling라며 플러그인이 비활성화 됩니다.

아래는 오류 전문입니다.

[01:12:34 ERROR]: Error occurred while enabling VoteSystem v0.1 (Is it up to date?)

java.lang.NullPointerException: null

        at java.util.Objects.requireNonNull(Objects.java:208) ~[?:?]

        at com.upload18.votesystem.VoteSystem.onEnable(VoteSystem.java:15) ~[VoteSystem.jar:?]

        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]

        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:370) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]

        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:541) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]

        at org.bukkit.craftbukkit.v1_18_R2.CraftServer.enablePlugin(CraftServer.java:560) ~[paper-1.18.2.jar:git-Paper-379]

        at org.bukkit.craftbukkit.v1_18_R2.CraftServer.enablePlugins(CraftServer.java:474) ~[paper-1.18.2.jar:git-Paper-379]

        at org.bukkit.craftbukkit.v1_18_R2.CraftServer.reload(CraftServer.java:1016) ~[paper-1.18.2.jar:git-Paper-379]

        at org.bukkit.Bukkit.reload(Bukkit.java:909) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]

        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:54) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]

        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]

        at org.bukkit.craftbukkit.v1_18_R2.CraftServer.dispatchCommand(CraftServer.java:906) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleCommand(ServerGamePacketListenerImpl.java:2307) ~[?:?]

        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:2118) ~[?:?]

        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:2099) ~[?:?]

        at net.minecraft.network.protocol.game.ServerboundChatPacket.handle(ServerboundChatPacket.java:46) ~[?:?]

        at net.minecraft.network.protocol.game.ServerboundChatPacket.a(ServerboundChatPacket.java:6) ~[?:?]

        at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$1(PacketUtils.java:51) ~[?:?]

        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?]

        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]

        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1400) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:188) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?]

        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1377) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1370) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.util.thread.BlockableEventLoop.runAllTasks(BlockableEventLoop.java:114) ~[?:?]

        at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1504) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1226) ~[paper-1.18.2.jar:git-Paper-379]

        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:316) ~[paper-1.18.2.jar:git-Paper-379]

        at java.lang.Thread.run(Thread.java:833) ~[?:?]

VoteSystem.java입니다.

package com.upload18.votesystem;

import org.bukkit.Bukkit;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.Objects;

public final class VoteSystem extends JavaPlugin {

    @Override
    public void onEnable() {
        getLogger().info("┌------------------------------------------┐");
        getLogger().info("Upload18 - VoteSystem has load successfully");
        getLogger().info("└------------------------------------------┘");
        Objects.requireNonNull(getCommand("투표")).setExecutor(new OpenUI());
        Bukkit.getPluginManager().registerEvents(new ClickVote(), this);
    }

    @Override
    public void onDisable() {
        // Plugin shutdown logic
    }
}

plugin.yml입니다.

name: VoteSystem
version: 0.1
main: com.upload18.votesystem.VoteSystem
api-version: 1.18

commands:
  투표:
    description: ㅇㅇ