First coding plugin Problem

Code:

[22:26:54 ERROR]: Could not load 'plugins\Die.jar' in folder 'plugins'
org.bukkit.plugin.InvalidDescriptionException: name is not defined[/COLOR][/I][/B][/U]
        at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile.java:876) ~[spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.plugin.PluginDescriptionFile.<init>(PluginDescriptionFile.java:228) ~[spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:157) ~[spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:133) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:305) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.reload(CraftServer.java:750) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.Bukkit.reload(Bukkit.java:525) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:27) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:634) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:444) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:407) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot.jar:git-Spigot-2cf50f0-8166d17]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112]
Caused by: java.lang.NullPointerException
        at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile.java:869) ~[spigot.jar:git-Spigot-2cf50f0-8166d17]
        ... 15 more
[22:26:55 INFO]: Server permissions file permissions.yml is empty, ignoring it

Hello guys I have problem.

Main.Java:

Code:

package diep;

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

public class Main extends JavaPlugin {
   
    @Override
    public void onEnable() {
        System.out.println("플러그인이 활성화 되었습니다");
    }
    @Override
    public void onDisable() {
        System.out.println("플러그인이 활성화 되었습니다");
    }
    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if(command.getName().equalsIgnoreCase("die")) {
            if(sender instanceof Player) {
                Player p = (Player) sender;
                p.setHealth(0);
                p.sendMessage("DIE");
            }else { 
                System.out.println("You need to be a player to do this command.");
            }
            return false;
        }
        if(command.getName().equalsIgnoreCase("hello")) {
            sender.sendMessage("hello");
            return false;
        }
           
        return true;
    }
}

plugin.yml

Code:

Name: Die
version: 1.12.2
main: diep.Main

commands:
  die:

I think that it will be good, but it is not...
Can you help me? plz.....

and, I'm Korean and middle school student, so I am not good at English.... Sorry.

Just in case, I'm going to upload the pictures.

 

plugin.yml

I changed source

Code:

Name: die
version: 1.12.2
main: diep.Main

commands:
  die:

Is it right?
But I can't
How can I solve this problem?

 

oh thanks.. I solved thank, so thiank you...