Solved Keep getting this errors

Hi everyone

i keep getting this errors:
OnJoin:

Code:

 [Server thread/CRITICAL]: Could not pass event 'pocketmine\event\player\PlayerJoinEvent' to 'SW_svile v0.6dev': Argument 4 passed to pocketmine\level\Position::__construct() must be an instance of pocketmine\level\Level, string given, called in C:\Users\PC\Desktop\GameCraftPE\Skywars\plugins\Skywars-Core-master\src\svile\sw\SWlistener.php on line 85 on svile\sw\SWlistener

PHP:

    public function onJoin(PlayerJoinEvent $ev){
        $ev->getPlayer()->teleport(new Position("-0.491200", "77.000000", "9.780400"), "179", "-3", $ev->getPlayer()->getLevel()->getFolderName("Lobby"));
          if ($ev->getPlayer()->hasPermission("rank.diamond")){
                $ev->getPlayer()->setGamemode("1");
                $pk = new ContainerSetContentPacket();
            $pk->targetEid = $ev->getPlayer()->getId();
                $pk->windowid = ContainerSetContentPacket::SPECIAL_CREATIVE;
                $ev->getPlayer()->dataPacket($pk);
          }
    }

OnVoidFall:

Code:

[06:04:14] [Server thread/CRITICAL]: TypeError: "Argument 4 passed to pocketmine\level\Position::__construct() must be an instance of pocketmine\level\Level, string given, called in C:\Users\PC\Desktop\GameCraftPE\Skywars\plugins\Skywars-Core-master\src\svile\sw\SWlistener.php on line 85" (EXCEPTION) in "/src/pocketmine/level/Position" at line 40

Code:

2017-06-25 [06:05:29] [Server thread/CRITICAL]: Could not pass event 'pocketmine\event\player\PlayerMoveEvent' to 'SW_svile v0.6dev': Argument 1 passed to pocketmine\utils\BinaryStream::putLFloat() must be of the type float, string given, called in phar://C:/Users/PC/Desktop/GameCraftPE/Skywars/PocketMine-MP.phar/src/pocketmine/network/mcpe/protocol/DataPacket.php on line 354 on svile\sw\SWlistener

PHP:

    public function onMove(PlayerMoveEvent $ev)
    {
        if ($ev->getPlayer()->getLevel()->getFolderName() === "Lobby"){
            if($ev->getTo()->getFloorY() < 3){
              $ev->getPlayer()->teleport(new Position("-0.491200", "77.000000", "9.780400"), "179", "-3");
            }
        }
 }

This is my plugin: https://github.com/GameCraftPE/Skywars-Core

how can i fix these errors?

 

updated