Pmmp v1.16.220 3.19.0 / (EXCEPTION) in "pmsrc/src/pocketmine/network/mcpe/protocol/AddPlayerPacket" at line 132

[teracube]

due to outdated version i suppose..
Pmmp version :
https://jenkins.pmmp.io/job/PocketMine-MP/lastSuccessfulBuild/artifact/PocketMine-MP.phar
Plugin version :
Slapper_dev-76.phar (api modified on plugin.yml)

021-04-07 [21:06:40] [Server thread/CRITICAL]: Error: "Call to undefined method pocketmine\item\ItemBlock::write()" (EXCEPTION) in "pmsrc/src/pocketmine/network/mcpe/protocol/AddPlayerPacket" at line 132
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #0 pmsrc/src/pocketmine/network/mcpe/protocol/DataPacket(127): pocketmine\network\mcpe\protocol\AddPlayerPacket->encodePayload()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #1 pmsrc/src/pocketmine/network/mcpe/RakLibInterface(244): pocketmine\network\mcpe\protocol\DataPacket->encode()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #2 pmsrc/src/pocketmine/Player(3359): pocketmine\network\mcpe\RakLibInterface->putPacket(object pocketmine\Player, object pocketmine\network\mcpe\protocol\AddPlayerPacket, boolean , boolean )
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #3 pmsrc/src/pocketmine/Player(3376): pocketmine\Player->sendDataPacket(object pocketmine\network\mcpe\protocol\AddPlayerPacket, boolean , boolean )
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #4 plugins/Slapper_dev-76.phar/src/slapper/entities/SlapperEntity(64): pocketmine\Player->dataPacket(object pocketmine\network\mcpe\protocol\AddPlayerPacket)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #5 pmsrc/src/pocketmine/entity/Entity(1961): slapper\entities\SlapperEntity->sendSpawnPacket(object pocketmine\Player)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #6 pmsrc/src/pocketmine/Player(1112): pocketmine\entity\Entity->spawnTo(object pocketmine\Player)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #7 pmsrc/src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(310): pocketmine\Player->doFirstSpawn()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #8 pmsrc/src/pocketmine/network/mcpe/protocol/SetLocalPlayerAsInitializedPacket(45): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleSetLocalPlayerAsInitialized(object pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #9 pmsrc/src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(109): pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket->handle(object pocketmine\network\mcpe\PlayerNetworkSessionAdapter)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #10 pmsrc/src/pocketmine/network/mcpe/protocol/BatchPacket(130): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(object pocketmine\network\mcpe\protocol\SetLocalPlayerAsInitializedPacket)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #11 pmsrc/src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(109): pocketmine\network\mcpe\protocol\BatchPacket->handle(object pocketmine\network\mcpe\PlayerNetworkSessionAdapter)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #12 pmsrc/src/pocketmine/Player(3311): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(object pocketmine\network\mcpe\protocol\BatchPacket)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #13 pmsrc/src/pocketmine/network/mcpe/RakLibInterface(169): pocketmine\Player->handleDataPacket(object pocketmine\network\mcpe\protocol\BatchPacket)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #14 pmsrc/vendor/pocketmine/raklib/src/server/ServerHandler(95): pocketmine\network\mcpe\RakLibInterface->handleEncapsulated(string[17] 72.XX.XX.90 41568, object raklib\protocol\EncapsulatedPacket, integer 0)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #15 pmsrc/src/pocketmine/network/mcpe/RakLibInterface(109): raklib\server\ServerHandler->handlePacket()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #16 pmsrc/src/pocketmine/network/mcpe/RakLibInterface(99): pocketmine\network\mcpe\RakLibInterface->process()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #17 pmsrc/vendor/pocketmine/snooze/src/SleeperHandler(113): pocketmine\network\mcpe\RakLibInterface->pocketmine\network\mcpe\{closure}()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #18 pmsrc/vendor/pocketmine/snooze/src/SleeperHandler(75): pocketmine\snooze\SleeperHandler->processNotifications()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #19 pmsrc/src/pocketmine/Server(2155): pocketmine\snooze\SleeperHandler->sleepUntil(double 1617822399.4511)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #20 pmsrc/src/pocketmine/Server(1992): pocketmine\Server->tickProcessor()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #21 pmsrc/src/pocketmine/Server(1586): pocketmine\Server->start()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #22 pmsrc/src/pocketmine/PocketMine(291): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[16] /home/container/, string[24] /home/container/plugins/)
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #23 pmsrc/src/pocketmine/PocketMine(321): pocketmine\server()
2021-04-07 [21:06:40] [Server thread/CRITICAL]: #24 pmsrc(11): require(string[71] phar:///home/container/PocketMine-MP.phar/src/pocketmine/PocketMine.php)
2021-04-07 [21:06:40] [Server thread/INFO]: Matt88K2 [-]
2021-04-07 [21:06:40] [Server thread/INFO]: Matt88K2[/72.XX.XX.90:41568] logged out due to Internal server error

[ghost]

Same

[teracube]

Same

you test with only Slapper plugin ?

[dktapps]

From the issue template:

• NO support provided for modified Slapper installations. THIS INCLUDES EDITING THE API VERSION.