Player teleport between worlds

I've trying to create a command who teleport the player to another world, but i having some problems, someone can help me?

Code:

package me.project.commands;

import me.project.main.Main;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import javax.swing.text.PlainDocument;

public class gotoCommand implements CommandExecutor {
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
        if(!(sender instanceof Player)){
            return true;
        }
        if(!sender.hasPermission("flash.goto")){
            sender.sendMessage("§cVocê nao tem permissão para executar esse comando!");
            return true;
        }
        if(cmd.getName().equalsIgnoreCase("goto")){
            World kitpvp = Bukkit.getServer().getWorld("kitpvp");
            World lobby = Bukkit.getServer().getWorld("lobby");
            Location kitpvpspawn = new Location(kitpvp, Main.pl.getConfig().getDouble("Warps.KITPVP.X"), Main.pl.getConfig().getDouble("Warps.KITPVP.Y"), Main.pl.getConfig().getDouble("Warps.KITPVP.Z"), (float) Main.pl.getConfig().getDouble("Warps.KITPVP.YAW"), (float) Main.pl.getConfig().getDouble("Warps.KITPVP.PITCH"));
            Location lobbyspawn = new Location(lobby, Main.pl.getConfig().getDouble("Warps.SPAWN.X"), Main.pl.getConfig().getDouble("Warps.SPAWN.Y"), Main.pl.getConfig().getDouble("Warps.SPAWN.Z"), (float) Main.pl.getConfig().getDouble("Warps.SPAWN.YAW"), (float) Main.pl.getConfig().getDouble("Warps.SPAWN.PITCH"));
            Player p = (Player) sender;
            if(args.length == 0 || args.length > 1){
                sender.sendMessage("§cComando incorreto!");
                return true;
            }
            if(args.length == 1){
                if(args[0].toUpperCase().equals("KITPVP")){
                    p.teleport(kitpvpspawn);
                    return true;
                }
                if(args[0].toUpperCase().equals("LOBBY")){
                    p.teleport(lobbyspawn);
                    return true;
                }
                sender.sendMessage("§cLocalização não encontrada!");
                return true;
            }
        }


        return false;
    }
}

CONSOLE ERROR:


[13:52:26 INFO]: idkG0D issued server command: /goto lobby
[13:52:26 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'goto' in plugin FlashMC v1.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerConnection.java:1115) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:950) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:53) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_201]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_201]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:696) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [spigot.jar:git-Spigot-c3c767f-33d5de3]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_201]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_8_R1.entity.CraftPlayer.teleport(CraftPlayer.java:464) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
at org.bukkit.craftbukkit.v1_8_R1.entity.CraftEntity.teleport(CraftEntity.java:223) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
at me.project.commands.gotoCommand.onCommand(gotoCommand.java:39) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-c3c767f-33d5de3]
... 14 more

@Tango_ Did'nt worked

 

@idkG0D
It seems your lobbyspawn location isn't valid. Try printing the values from the config such as the world, x, y and z and see if they print to console / ingame without error.