Could not load plugin - Githubissues

I loaded my plugin by source to compile it and all I get is the single error of: [CRITICAL] Could not load plugin 'Heal'

`package Heal.Apple;

import cn.nukkit.event.Listener; import cn.nukkit.plugin.PluginBase; import cn.nukkit.Server; import cn.nukkit.Player; import cn.nukkit.command.CommandSender; import cn.nukkit.command.Command; import cn.nukkit.utils.TextFormat;

import java.io.File; import java.io.IOException; import java.util.LinkedHashMap;

class Main extends PluginBase implements Listener {

        @Override
        public void onEnable(){
              this.getServer().getPluginManager().registerEvents(this, this);
         }

        public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
         switch(cmd.getName()){
           case "heal":
            if(args.length == 0){
          if(sender.hasPermission("heal.command")){
             sender.sendMessage("Please specify a player!");
            } else {
             sender.sendMessage("You do not have permission to run this command!");
         } 
      }

                 if (sender.hasPermission("heal.command")) {
                     sender.sendMessage("That player is not online!");
                 } else {
                     sender.sendMessage("You do not have permission to run this command!");
                 }
                sender.sendMessage("You healed a player!");
                this.getServer().getPlayer(args[0]).setHealth(this.getServer().getPlayer(args[0]).getMaxHealth());
              }

                   if(this.getServer().getPlayer(args[0]).getName() == sender.getName()){
                  if(sender.hasPermission("heal.command")){
                     sender.sendMessage("You healed yourself!");
                this.getServer().getPlayer(args[0]).setHealth(this.getServer().getPlayer(args[0]).getMaxHealth());
              } else {
                sender.sendMessage("You do not have permission to run this command!");
             }
           }

         switch(cmd.getName()){
            case "healall":
                   if(args.length == 0){
                   if(sender.hasPermission("healall.command")){
                           for(Player p : this.getServer().getOnlinePlayers().values()){
                           p.setMaxHealth(p.getMaxHealth());
                           }
                                 sender.sendMessage("Everyone was healed!");
                    } else {
                      sender.sendMessage("You do not have permission to run this command!");
                    }
            }
         }
            return true;
        }

}

fengberd / FDevTools

Could not load plugin #5