Internal server error on join

[Mohagames205]

• Issue Description: When I join I get "Internal server error"

• Version: 1.5.1

• Server Version: Pocketmine 3.8.3

• Crashdump, backtrace or other files:```[13:21:17] [Server thread/INFO]: Mohagames205[/81.245.220.164:57978] logged in with entity id 5 at (DEEP SUPERFLAT NO STRUCTURES, -701, 31, 893) [13:21:23] [Server thread/CRITICAL]: Error: "Call to a member function count() on null" (EXCEPTION) in "plugins/MultiWorld.phar/src/czechpmdevs/multiworld/api/WorldGameRulesAPI" at line 60 [13:21:23] [Server thread/DEBUG]: #0 plugins/MultiWorld.phar/src/czechpmdevs/multiworld/api/WorldGameRulesAPI(177): czechpmdevs\multiworld\api\WorldGameRulesAPI::getLevelGameRules(pocketmine\level\Level object) [13:21:23] [Server thread/DEBUG]: #1 plugins/MultiWorld.phar/src/czechpmdevs/multiworld/EventListener(85): czechpmdevs\multiworld\api\WorldGameRulesAPI::updateGameRules(pocketmine\Player object) [13:21:23] [Server thread/DEBUG]: #2 src/pocketmine/plugin/MethodEventExecutor(38): czechpmdevs\multiworld\EventListener->onJoin(pocketmine\event\player\PlayerJoinEvent object) [13:21:23] [Server thread/DEBUG]: #3 src/pocketmine/plugin/RegisteredListener(98): pocketmine\plugin\MethodEventExecutor->execute(czechpmdevs\multiworld\EventListener object, pocketmine\event\player\PlayerJoinEvent object) [13:21:23] [Server thread/DEBUG]: #4 src/pocketmine/event/Event(99): pocketmine\plugin\RegisteredListener->callEvent(pocketmine\event\player\PlayerJoinEvent object) [13:21:23] [Server thread/DEBUG]: #5 src/pocketmine/Player(1082): pocketmine\event\Event->call() [13:21:23] [Server thread/DEBUG]: #6 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(297): pocketmine\Player->doFirstSpawn() [13:21:23] [Server thread/DEBUG]: #7 src/pocketmine/network/mcpe/protocol/SetLocalPlayerAsInitializedPacket(45): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleSetLocalPlayerAsInitialized(pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket object) [13:21:23] [Server thread/DEBUG]: #8 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(109): pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket->handle(pocketmine\network\mcpe\PlayerNetworkSessionAdapter object) [13:21:23] [Server thread/DEBUG]: #9 src/pocketmine/network/mcpe/protocol/BatchPacket(123): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket object) [13:21:23] [Server thread/DEBUG]: #10 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(109): pocketmine\network\mcpe\protocol\BatchPacket->handle(pocketmine\network\mcpe\PlayerNetworkSessionAdapter object) [13:21:23] [Server thread/DEBUG]: #11 src/pocketmine/Player(3124): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(pocketmine\network\mcpe\protocol\BatchPacket object) [13:21:23] [Server thread/DEBUG]: #12 src/pocketmine/network/mcpe/RakLibInterface(169): pocketmine\Player->handleDataPacket(pocketmine\network\mcpe\protocol\BatchPacket object) [13:21:23] [Server thread/DEBUG]: #13 vendor/pocketmine/raklib/src/server/ServerHandler(99): pocketmine\network\mcpe\RakLibInterface->handleEncapsulated(string 81.245.220.164 57978, raklib\protocol\EncapsulatedPacket object, integer 0) [13:21:23] [Server thread/DEBUG]: #14 src/pocketmine/network/mcpe/RakLibInterface(109): raklib\server\ServerHandler->handlePacket() [13:21:23] [Server thread/DEBUG]: #15 src/pocketmine/network/mcpe/RakLibInterface(99): pocketmine\network\mcpe\RakLibInterface->process() [13:21:23] [Server thread/DEBUG]: #16 vendor/pocketmine/snooze/src/SleeperHandler(123): pocketmine\network\mcpe\RakLibInterface->pocketmine\network\mcpe{closure}() [13:21:23] [Server thread/DEBUG]: #17 vendor/pocketmine/snooze/src/SleeperHandler(85): pocketmine\snooze\SleeperHandler->processNotifications() [13:21:23] [Server thread/DEBUG]: #18 src/pocketmine/Server(2339): pocketmine\snooze\SleeperHandler->sleepUntil(double 1559827283.9472) [13:21:23] [Server thread/DEBUG]: #19 src/pocketmine/Server(2196): pocketmine\Server->tickProcessor() [13:21:23] [Server thread/DEBUG]: #20 src/pocketmine/Server(1775): pocketmine\Server->start() [13:21:23] [Server thread/DEBUG]: #21 src/pocketmine/PocketMine(266): pocketmine\Server->__construct(BaseClassLoader object, pocketmine\utils\MainLogger object, string /home/container/, string /home/container/plugins/) [13:21:23] [Server thread/INFO]: [StaffChat] Mohagames205 disconnected [13:21:23] [Server thread/INFO]: Mohagames205 left the game [13:21:23] [Server thread/INFO]: Mohagames205[/81.245.220.164:57978] logged out due to Internal server error [13:21:23] [RakLibServer thread/NOTICE]: Blocked 81.245.220.164 for 5 seconds

[GamakCZ]

thx for report

[GamakCZ]

It should be fixed in next release