Getting internal server error when updating to the latest pocketmine version

[JohnnyX071]

Hello, i have the 3.12.6 pocketmine version and when i update to the 3.13.0 and try to join the server i get internal server error, this is what i see in the console (AverageToast22 is my name) :

[09:21:05] [Server thread/INFO]: AverageToast22 joined the game
[09:21:05] [Server thread/CRITICAL]: TypeError: "Argument 1 passed to pocketmine\network\mcpe\NetworkBinaryStream::putString() must be of the type string, int given, called in phar:///home/container/PocketMine-MP.phar/src/pocketmine/network/mcpe/protocol/AddActorPacket.php on line 211" (EXCEPTION) in "src/pocketmine/network/mcpe/NetworkBinaryStream" at line 62
[09:21:05] [Server thread/DEBUG]: #0 src/pocketmine/network/mcpe/protocol/AddActorPacket(211): pocketmine\network\mcpe\NetworkBinaryStream->putString(integer 33)
[09:21:05] [Server thread/DEBUG]: #1 src/pocketmine/network/mcpe/protocol/DataPacket(127): pocketmine\network\mcpe\protocol\AddActorPacket->encodePayload()
[09:21:05] [Server thread/DEBUG]: #2 src/pocketmine/network/mcpe/RakLibInterface(244): pocketmine\network\mcpe\protocol\DataPacket->encode()
[09:21:05] [Server thread/DEBUG]: #3 src/pocketmine/Player(3235): pocketmine\network\mcpe\RakLibInterface->putPacket(object pocketmine\Player, object pocketmine\network\mcpe\protocol\AddActorPacket, boolean , boolean )
[09:21:05] [Server thread/DEBUG]: #4 src/pocketmine/Player(3252): pocketmine\Player->sendDataPacket(object pocketmine\network\mcpe\protocol\AddActorPacket, boolean , boolean )
[09:21:05] [Server thread/DEBUG]: #5 plugins/Slapper.phar/src/slapper/entities/SlapperEntity(54): pocketmine\Player->dataPacket(object pocketmine\network\mcpe\protocol\AddActorPacket)
[09:21:05] [Server thread/DEBUG]: #6 src/pocketmine/entity/Entity(1945): slapper\entities\SlapperEntity->sendSpawnPacket(object pocketmine\Player)
[09:21:05] [Server thread/DEBUG]: #7 src/pocketmine/Player(1075): pocketmine\entity\Entity->spawnTo(object pocketmine\Player)
[09:21:05] [Server thread/DEBUG]: #8 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(315): pocketmine\Player->doFirstSpawn()
[09:21:05] [Server thread/DEBUG]: #9 src/pocketmine/network/mcpe/protocol/SetLocalPlayerAsInitializedPacket(45): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleSetLocalPlayerAsInitialized(object pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket)
[09:21:05] [Server thread/DEBUG]: #10 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(110): pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket->handle(object pocketmine\network\mcpe\PlayerNetworkSessionAdapter)
[09:21:05] [Server thread/DEBUG]: #11 src/pocketmine/network/mcpe/protocol/BatchPacket(126): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(object pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket)
[09:21:05] [Server thread/DEBUG]: #12 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(110): pocketmine\network\mcpe\protocol\BatchPacket->handle(object pocketmine\network\mcpe\PlayerNetworkSessionAdapter)
[09:21:05] [Server thread/DEBUG]: #13 src/pocketmine/Player(3187): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(object pocketmine\network\mcpe\protocol\BatchPacket)
[09:21:05] [Server thread/DEBUG]: #14 src/pocketmine/network/mcpe/RakLibInterface(169): pocketmine\Player->handleDataPacket(object pocketmine\network\mcpe\protocol\BatchPacket)
[09:21:05] [Server thread/DEBUG]: #15 vendor/pocketmine/raklib/src/server/ServerHandler(99): pocketmine\network\mcpe\RakLibInterface->handleEncapsulated(string[18] 78.87.59.221 57225, object raklib\protocol\EncapsulatedPacket, integer 0)
[09:21:05] [Server thread/DEBUG]: #16 src/pocketmine/network/mcpe/RakLibInterface(109): raklib\server\ServerHandler->handlePacket()
[09:21:05] [Server thread/DEBUG]: #17 src/pocketmine/network/mcpe/RakLibInterface(99): pocketmine\network\mcpe\RakLibInterface->process()
[09:21:05] [Server thread/DEBUG]: #18 vendor/pocketmine/snooze/src/SleeperHandler(123): pocketmine\network\mcpe\RakLibInterface->pocketmine\network\mcpe{closure}()
[09:21:05] [Server thread/DEBUG]: #19 vendor/pocketmine/snooze/src/SleeperHandler(85): pocketmine\snooze\SleeperHandler->processNotifications()
[09:21:05] [Server thread/DEBUG]: #20 src/pocketmine/Server(2154): pocketmine\snooze\SleeperHandler->sleepUntil(double 1591867265.1284)
[09:21:05] [Server thread/DEBUG]: #21 src/pocketmine/Server(1991): pocketmine\Server->tickProcessor()
[09:21:05] [Server thread/DEBUG]: #22 src/pocketmine/Server(1585): pocketmine\Server->start()
[09:21:05] [Server thread/DEBUG]: #23 src/pocketmine/PocketMine(273): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[16] /home/container/, string[24] /home/container/plugins/)
[09:21:05] [Server thread/DEBUG]: #24 src/pocketmine/PocketMine(296): pocketmine\server()
[09:21:05] [Server thread/DEBUG]: #25 (11): require(string[71] phar:///home/container/PocketMine-MP.phar/src/pocketmine/PocketMine.php)
[09:21:05] [Server thread/INFO]: [StaffChat] AverageToast22 disconnected
[09:21:05] [Server thread/INFO]: AverageToast22 left the game
[09:21:05] [Server thread/INFO]: AverageToast22[/78.87.59.221:57225] logged out due to Internal server error
[09:21:05] [RakLibServer thread/NOTICE]: Blocked 78.87.59.221 for 5 seconds

So can you tell me what the problem is and how can i fix it, i cant have 2 servers so i cant test it without plugins. Can you help me?
Thank you!!

[JohnnyX071]

why you closed my ticket, i need help please and how can i get help then with the internal server error?