Minecraftserver Java Plugin IntelliJ IDEA

Hi all, i have make a plugin .This works fine with 1.20.4 Serverversion. in 1.21 at beginning it does not work. I change some and it work90% .so the Problem ist with location. I Read location from mysql Database. in the actual world i can teleport fine . If i want to teleport in another World (it is in the root Folder from Minecraftserver. Such as the original World. Code: if (!(sender instanceof Player)) { sender.sendMessage(ChatColor.RED + "Du musst ein Spieler sein!!"); return false; }//SpielerAbfrage ende Player player = (Player) sender; if (args.length == 1) { if (args[0].equalsIgnoreCase("tele")) { player.sendMessage(ChatColor.GREEN + player.getName() + " Festhalten es geht los."); String testworld = "NeueWelt"; double x1 = 200; double y1 = 200; double z1 = 200; Location location = new Location(Bukkit.getWorld(testworld), x1, y1, z1); ((Player) sender).teleport(location); } } What can be the problem. in Version 1.20.4 this works fine. It must be a change in new Java/MinecraftAPi . Can any body help me please. In google i search few times. i dont know the right search word Thank all