Crash

[Bruth78]

Whenever i join, i get kicked after a few seconds
Crash:
[23:28:35] [Server thread/CRITICAL]: Error: "Call to undefined method stdClass::isClosed()" (EXCEPTION) in "src/pocketmine/level/Position" at line 98
[23:28:35] [Server thread/DEBUG]: #0 src/pocketmine/entity/Entity(2113): pocketmine\level\Position->isValid()
[23:28:35] [Server thread/DEBUG]: #1 src/pocketmine/entity/Living(932): pocketmine\entity\Entity->close()
[23:28:35] [Server thread/DEBUG]: #2 src/pocketmine/entity/Entity(2203): pocketmine\entity\Living->close()
[23:28:35] [Server thread/DEBUG]: #3 src/pocketmine/level/Level(1224): pocketmine\entity\Entity->__destruct()
[23:28:35] [Server thread/DEBUG]: #4 src/pocketmine/Player(1553): pocketmine\level\Level->getCollisionBlocks(pocketmine\math\AxisAlignedBB object, boolean 1)
[23:28:35] [Server thread/DEBUG]: #5 src/pocketmine/entity/Entity(1738): pocketmine\Player->checkGroundState(double 0.7391, double 0.30560000000001, double -0.0070999999999799, double 0.7391, double 0.30560000000001, double -0.0070999999999799)
[23:28:35] [Server thread/DEBUG]: #6 src/pocketmine/Player(1609): pocketmine\entity\Entity->move(double 0.7391, double 0.30560000000001, double -0.0070999999999799)
[23:28:35] [Server thread/DEBUG]: #7 src/pocketmine/Player(1752): pocketmine\Player->processMovement(integer 1)
[23:28:36] [Server thread/DEBUG]: #8 src/pocketmine/level/Level(849): pocketmine\Player->onUpdate(integer 334)
[23:28:36] [Server thread/DEBUG]: #9 src/pocketmine/level/Level(794): pocketmine\level\Level->actuallyDoTick(integer 334)
[23:28:36] [Server thread/DEBUG]: #10 src/pocketmine/Server(2435): pocketmine\level\Level->doTick(integer 334)
[23:28:36] [Server thread/DEBUG]: #11 src/pocketmine/Server(2566): pocketmine\Server->checkTickUpdates(integer 334, double 1555885715.9866)
[23:28:36] [Server thread/DEBUG]: #12 src/pocketmine/Server(2335): pocketmine\Server->tick()
[23:28:36] [Server thread/DEBUG]: #13 src/pocketmine/Server(2196): pocketmine\Server->tickProcessor()
[23:28:36] [Server thread/DEBUG]: #14 src/pocketmine/Server(1775): pocketmine\Server->start()
[23:28:36] [Server thread/DEBUG]: #15 src/pocketmine/PocketMine(258): pocketmine\Server->__construct(BaseClassLoader object, pocketmine\utils\MainLogger object, string C:\Users\Leona\Desktop\MCPE SERVER\PocketMine-MP, string C:\Users\Leona\Desktop\MCPE SERVER\PocketMine-MP\plugins)
[23:28:36] [Server thread/DEBUG]: #16 (1): require(string phar://C:/Users/Leona/Desktop/MCPE SERVER/PocketMine-MP/PocketMine-MP.phar/src/pocketmine/PocketMine.php)
[23:28:36] [Server thread/EMERGENCY]: An unrecoverable error has occurred and the server has crashed. Creating a crash dump
[23:28:36] [Server thread/EMERGENCY]: Please upload the "C:\Users\Leona\Desktop\MCPE SERVER\PocketMine-MP\crashdumps/Sun_Apr_21-23.28.36-BST_2019.log" file to the Crash Archive and submit the link to the Bug Reporting page. Give as much info as you can.

[CortexPE]

cant reproduce