PlayerBlockEvent spam

[ghost]

11:51:18 [CRITICAL] 이벤트 'cn.nukkit.event.block.BlockBreakEvent'을(를) 'Pokkit v0.6-SNAPSHOT'에 전달하지 못했습니다: nl.rutgerkok.pokkit.pluginservice.PlayerBlockEvents에서의 null
11:51:18 [ALERT] cn.nukkit.utils.EventException
at cn.nukkit.plugin.MethodEventExecutor.execute(MethodEventExecutor.java:34)
at cn.nukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:56)
at cn.nukkit.plugin.PluginManager.callEvent(PluginManager.java:553)
at cn.nukkit.level.Level.useBreakOn(Level.java:1825)
at cn.nukkit.Player.handleDataPacket(Player.java:2761)
at cn.nukkit.network.Network.processPackets(Network.java:180)
at cn.nukkit.network.Network.processBatch(Network.java:151)
at cn.nukkit.Player.handleDataPacket(Player.java:1932)
at cn.nukkit.network.RakNetInterface.handleEncapsulated(RakNetInterface.java:157)
at cn.nukkit.raknet.server.ServerHandler.handlePacket(ServerHandler.java:123)
at cn.nukkit.network.RakNetInterface.process(RakNetInterface.java:66)
at cn.nukkit.network.Network.processInterfaces(Network.java:75)
at cn.nukkit.Server.tick(Server.java:996)
at cn.nukkit.Server.tickProcessor(Server.java:794)
at cn.nukkit.Server.start(Server.java:773)
at cn.nukkit.Server.(Server.java:464)
at cn.nukkit.Nukkit.main(Nukkit.java:68)
Caused by: java.lang.NoSuchMethodError: cn.nukkit.block.Block.getDrops(Lcn/nukkit/item/Item;)[[I
at nl.rutgerkok.pokkit.world.PokkitBlock.getDrops0(PokkitBlock.java:125)
at nl.rutgerkok.pokkit.world.PokkitBlock.getDrops(PokkitBlock.java:108)
at nl.rutgerkok.pokkit.pluginservice.PlayerBlockEvents.onBlockBreak(PlayerBlockEvents.java:65)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cn.nukkit.plugin.MethodEventExecutor.execute(MethodEventExecutor.java:29)
... 16 more

FasyAsyncWorldedit(Nukkit) + Pokkit plugin

reproduce : pick wooden axe and break any blocks