internal server error

[fairyboy21]

[22:26:07] [Server thread/CRITICAL]: Error: "Call to a member function getSize() on array" (EXCEPTION) in "src/pocketmine/item/enchantment/Enchantment" at line 154
[22:26:07] [Server thread/DEBUG]: #0 plugins/BuilderTools_dev-76.phar/src/czechpmdevs/buildertools/commands/WandCommand(61): pocketmine\item\enchantment\Enchantment::getEnchantment(integer 50)
[22:26:07] [Server thread/DEBUG]: #1 src/pocketmine/command/SimpleCommandMap(248): czechpmdevs\buildertools\commands\WandCommand->execute(object pocketmine\Player, string[5] /wand, array[0])
[22:26:07] [Server thread/DEBUG]: #2 src/pocketmine/Server(1807): pocketmine\command\SimpleCommandMap->dispatch(object pocketmine\Player, string[5] /wand)
[22:26:07] [Server thread/DEBUG]: #3 src/pocketmine/Player(2221): pocketmine\Server->dispatchCommand(object pocketmine\Player, string[5] /wand)
[22:26:07] [Server thread/DEBUG]: #4 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(244): pocketmine\Player->chat(string[6] //wand)
[22:26:07] [Server thread/DEBUG]: #5 src/pocketmine/network/mcpe/protocol/CommandRequestPacket(54): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleCommandRequest(object pocketmine\network\mcpe\protocol\CommandRequestPacket)
[22:26:07] [Server thread/DEBUG]: #6 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(110): pocketmine\network\mcpe\protocol\CommandRequestPacket->handle(object pocketmine\network\mcpe\PlayerNetworkSessionAdapter)
[22:26:07] [Server thread/DEBUG]: #7 src/pocketmine/network/mcpe/protocol/BatchPacket(126): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(object pocketmine\network\mcpe\protocol\CommandRequestPacket)
[22:26:07] [Server thread/DEBUG]: #8 src/pocketmine/network/mcpe/PlayerNetworkSessionAdapter(110): pocketmine\network\mcpe\protocol\BatchPacket->handle(object pocketmine\network\mcpe\PlayerNetworkSessionAdapter)
[22:26:07] [Server thread/DEBUG]: #9 src/pocketmine/Player(3121): pocketmine\network\mcpe\PlayerNetworkSessionAdapter->handleDataPacket(object pocketmine\network\mcpe\protocol\BatchPacket)
[22:26:07] [Server thread/DEBUG]: #10 src/pocketmine/network/mcpe/RakLibInterface(169): pocketmine\Player->handleDataPacket(object pocketmine\network\mcpe\protocol\BatchPacket)
[22:26:07] [Server thread/DEBUG]: #11 vendor/pocketmine/raklib/src/server/ServerHandler(99): pocketmine\network\mcpe\RakLibInterface->handleEncapsulated(string[20] ip port, object raklib\protocol\EncapsulatedPacket, integer 0)
[22:26:07] [Server thread/DEBUG]: #12 src/pocketmine/network/mcpe/RakLibInterface(109): raklib\server\ServerHandler->handlePacket()
[22:26:07] [Server thread/DEBUG]: #13 src/pocketmine/network/mcpe/RakLibInterface(99): pocketmine\network\mcpe\RakLibInterface->process()
[22:26:07] [Server thread/DEBUG]: #14 vendor/pocketmine/snooze/src/SleeperHandler(123): pocketmine\network\mcpe\RakLibInterface->pocketmine\network\mcpe{closure}()
[22:26:07] [Server thread/DEBUG]: #15 vendor/pocketmine/snooze/src/SleeperHandler(85): pocketmine\snooze\SleeperHandler->processNotifications()
[22:26:07] [Server thread/DEBUG]: #16 src/pocketmine/Server(2146): pocketmine\snooze\SleeperHandler->sleepUntil(double 1591482367.9103)
[22:26:07] [Server thread/DEBUG]: #17 src/pocketmine/Server(1990): pocketmine\Server->tickProcessor()
[22:26:07] [Server thread/DEBUG]: #18 src/pocketmine/Server(1584): pocketmine\Server->start()
[22:26:07] [Server thread/DEBUG]: #19 src/pocketmine/PocketMine(272): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[16] /home/container/, string[24] /home/container/plugins/)
[22:26:07] [Server thread/DEBUG]: #20 src/pocketmine/PocketMine(295): pocketmine\server()
[22:26:08] [Server thread/INFO]: Derank Fairy[/ip:port] logged out due to Internal

[SOF3]

what makes you think this issue is even related to EconomyS?