This is just to let the owner know, your tp player args are wrong, you are using arg 0 twice for x and for player it should be:

Basically it should be using arg[1] for x and then so one, but looks like he missed this, its been like this for a long while over the patches, so for now anyone looking to fix this issue here it is.
Line 2024:

                case 4:
                    target = FindPlayersSingle(args[0], player);
                    if (target == null) return;
                    if (!float.TryParse(args[1], out x) || !float.TryParse(args[2], out y) || !float.TryParse(args[3], out z))
                    {
                        PrintMsgL(player, "InvalidCoordinates");
                        return;
                    }​

nice catch, thanks