PocketMine-MP Crash Dump Tue Oct 15 18:45:38 MSK 2019

Error: Return value of pocketmine\network\mcpe\NetworkSession::getInvManager() must be an instance of pocketmine\network\mcpe\InventoryManager, null returned
File: src/network/mcpe/NetworkSession
Line: 810
Type: TypeError

Code:
[801] 		$world = $this->player->getWorld();
[802] 		$world->sendTime($this->player);
[803] 		$world->sendDifficulty($this->player);
[804] 	}
[805]
[806] 	/**
[807] 	 * @return InventoryManager
[808] 	 */
[809] 	public function getInvManager() : InventoryManager{
[810] 		return $this->invManager;
[811] 	}
[812]
[813] 	/**
[814] 	 * TODO: expand this to more than just humans
[815] 	 * TODO: offhand
[816] 	 *
[817] 	 * @param Human $mob
[818] 	 */
[819] 	public function onMobEquipmentChange(Human $mob) : void{
[820] 		//TODO: we could send zero for slot here because remote players don't need to know which slot was selected

Backtrace:
#0 src/network/mcpe/handler/InGamePacketHandler(334): pocketmine\network\mcpe\NetworkSession->getInvManager()
#1 src/network/mcpe/handler/InGamePacketHandler(182): pocketmine\network\mcpe\handler\InGamePacketHandler->handleUseItemOnEntityTransaction(object pocketmine\network\mcpe\protocol\types\inventory\UseItemOnEntityTransactionData)
#2 src/network/mcpe/protocol/InventoryTransactionPacket(84): pocketmine\network\mcpe\handler\InGamePacketHandler->handleInventoryTransaction(object pocketmine\network\mcpe\protocol\InventoryTransactionPacket)
#3 src/network/mcpe/NetworkSession(349): pocketmine\network\mcpe\protocol\InventoryTransactionPacket->handle(object pocketmine\network\mcpe\handler\InGamePacketHandler)
#4 src/network/mcpe/NetworkSession(315): pocketmine\network\mcpe\NetworkSession->handleDataPacket(object pocketmine\network\mcpe\protocol\InventoryTransactionPacket)
#5 src/network/mcpe/raklib/RakLibInterface(152): pocketmine\network\mcpe\NetworkSession->handleEncoded(string[73] x.c.abf.b.j.m.......9.lvf....KM.JL+.*.I.L-b`..cf`d.a..h...........H...).[)
#6 vendor/pocketmine/raklib/src/server/ServerHandler(102): pocketmine\network\mcpe\raklib\RakLibInterface->handleEncapsulated(integer 0, object raklib\protocol\EncapsulatedPacket, integer 0)
#7 src/network/mcpe/raklib/RakLibInterface(96): raklib\server\ServerHandler->handlePacket()
#8 vendor/pocketmine/snooze/src/SleeperHandler(123): pocketmine\network\mcpe\raklib\RakLibInterface->pocketmine\network\mcpe\raklib\{closure}()
#9 vendor/pocketmine/snooze/src/SleeperHandler(85): pocketmine\snooze\SleeperHandler->processNotifications()
#10 src/Server(1765): pocketmine\snooze\SleeperHandler->sleepUntil(double 1571154338.6608)
#11 src/Server(1308): pocketmine\Server->tickProcessor()
#12 src/PocketMine(268): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[61] /home/saehing/.............. ......../pmmp/hub/PocketMine-MP/, string[69] /home/saehing/.............. ......../pmmp/hub/PocketMine-MP/plugins/)
#13 src/PocketMine(290): pocketmine\server()

PocketMine-MP version: 4.0.0+dev [Protocol 361]
Git commit: 262dbc0346b464ce3e728eb09649ecd4d4b0be14-dirty
uname -a: Linux forsinc 5.0.0-29-generic #31-Ubuntu SMP Thu Sep 12 13:05:32 UTC 2019 x86_64
PHP Version: 7.3.9
Zend version: 3.3.9
OS : Linux, linux

Loaded plugins:
DevTools 1.14.0+dev by PocketMine Team for API(s) 4.0.0
HubEngine 1.2 by saehing for API(s) 4.0.0
EasyForms 1.5.0 by  for API(s) 4.0.0

----------------------REPORT THE DATA BELOW THIS LINE-----------------------

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===END CRASH DUMP===