Command ERROR -Altay 4.0.0

[ghost]

[04:25:56] [Server thread/CRITICAL]: 샌드백에서 명령어 '샌드백' 실행 중 처리되지 않은 예외가 발생했습니다: Argument 2 passed to pocketmine\entity\Entity::createEntity() must be an instance of pocketmine\level\Level, null given, called in D:\Altay-master\plugins\PunchingBag-master\src\whitejing\punchingbag\command\SummonCommand.php on line 73
[04:25:56] [Server thread/CRITICAL]: TypeError: "Argument 2 passed to pocketmine\entity\Entity::createEntity() must be an instance of pocketmine\level\Level, null given, called in D:\Altay-master\plugins\PunchingBag-master\src\whitejing\punchingbag\command\SummonCommand.php on line 73" (EXCEPTION) in "src/pocketmine/entity/Entity" at line 432
[04:25:56] [Server thread/DEBUG]: #0 PunchingBag-master/src/whitejing/punchingbag/command/SummonCommand(73): pocketmine\entity\Entity::createEntity(integer 32, NULL , pocketmine\nbt\tag\CompoundTag object)
[04:25:56] [Server thread/DEBUG]: #1 src/pocketmine/command/SimpleCommandMap(283): whitejing\punchingbag\command\SummonCommand->execute(pocketmine\Player object, string ........., array Array())
[04:25:56] [Server thread/DEBUG]: #2 src/pocketmine/Server(2190): pocketmine\command\SimpleCommandMap->dispatch(pocketmine\Player object, string .........)
[04:25:56] [Server thread/DEBUG]: #3 src/pocketmine/Player(2734): pocketmine\Server->dispatchCommand(pocketmine\Player object, string .........)
[04:25:56] [Server thread/DEBUG]: #4 src/pocketmine/network/mcpe/handler/SimpleSessionHandler(403): pocketmine\Player->handleCommandRequest(pocketmine\network\mcpe\protocol\CommandRequestPacket object)
[04:25:56] [Server thread/DEBUG]: #5 src/pocketmine/network/mcpe/protocol/CommandRequestPacket(54): pocketmine\network\mcpe\handler\SimpleSessionHandler->handleCommandRequest(pocketmine\network\mcpe\protocol\CommandRequestPacket object)
[04:25:56] [Server thread/DEBUG]: #6 src/pocketmine/network/mcpe/NetworkSession(210): pocketmine\network\mcpe\protocol\CommandRequestPacket->handle(pocketmine\network\mcpe\handler\SimpleSessionHandler object)
[04:25:56] [Server thread/DEBUG]: #7 src/pocketmine/network/mcpe/NetworkSession(191): pocketmine\network\mcpe\NetworkSession->handleDataPacket(pocketmine\network\mcpe\protocol\CommandRequestPacket object)
[04:25:56] [Server thread/DEBUG]: #8 src/pocketmine/network/mcpe/RakLibInterface(135): pocketmine\network\mcpe\NetworkSession->handleEncoded(string x.........z....62h{.....nr...nw.......(..)
[04:25:56] [Server thread/DEBUG]: #9 vendor/pocketmine/raklib/src/server/ServerHandler(98): pocketmine\network\mcpe\RakLibInterface->handleEncapsulated(string 58.121.136.40 54613, raklib\protocol\EncapsulatedPacket object, integer 0)
[04:25:56] [Server thread/DEBUG]: #10 src/pocketmine/network/mcpe/RakLibInterface(81): raklib\server\ServerHandler->handlePacket()
[04:25:56] [Server thread/DEBUG]: #11 vendor/pocketmine/snooze/src/SleeperHandler(120): pocketmine\network\mcpe\RakLibInterface->pocketmine\network\mcpe{closure}()
[04:25:56] [Server thread/DEBUG]: #12 vendor/pocketmine/snooze/src/SleeperHandler(82): pocketmine\snooze\SleeperHandler->processNotifications()
[04:25:56] [Server thread/DEBUG]: #13 src/pocketmine/Server(2514): pocketmine\snooze\SleeperHandler->sleepUntil(double 1537296956.5402)
[04:25:56] [Server thread/DEBUG]: #14 src/pocketmine/Server(2383): pocketmine\Server->tickProcessor()
[04:25:56] [Server thread/DEBUG]: #15 src/pocketmine/Server(1884): pocketmine\Server->start()
[04:25:56] [Server thread/DEBUG]: #16 src/pocketmine/PocketMine(246): pocketmine\Server->__construct(BaseClassLoader object, pocketmine\utils\MainLogger object, string D:......... PC\Altay-master, string D:......... PC\Altay-master\plugins)
[04:25:56] [Server thread/DEBUG]: #17 D:/Altay-master/Altay.phar(1): require_once(string phar://D:/......... PC/Altay-master/Altay.phar/src/pocketmine/PocketMine.php)