[00:36:33 INFO]: FeatherStones issued server command: /sell hand
[00:36:34 ERROR]: Could not pass event EntityPickupItemEvent to WildStacker v2.9.1
org.bukkit.event.EventException: null
        at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:72) ~[patched_1.12.2.jar:git-Paper-1612]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched_1.12.2.jar:git-Paper-1612]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.12.2.jar:git-Paper-1612]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:513) ~[patched_1.12.2.jar:git-Paper-1612]
        at com.bgsoftware.wildstacker.listeners.events.EventsListener$EntityPickup.onEntityPickupEvent(EventsListener.java:38) ~[?:?]
        at com.destroystokyo.paper.event.executor.MethodHandleEventExecutor.execute(MethodHandleEventExecutor.java:35) ~[patched_1.12.2.jar:git-Paper-
1612]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched_1.12.2.jar:git-Paper-1612]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.12.2.jar:git-Paper-1612]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:513) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.EntityInsentient.a(EntityInsentient.java:577) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.EntityInsentient.n(EntityInsentient.java:524) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.EntityMonster.n(EntityMonster.java:24) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.EntityZombie.n(EntityZombie.java:155) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.EntityLiving.B_(EntityLiving.java:2024) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.EntityInsentient.B_(EntityInsentient.java:247) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.EntityMonster.B_(EntityMonster.java:28) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.World.entityJoinedWorld(World.java:1797) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.World.h(World.java:1767) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.World.tickEntities(World.java:1574) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.WorldServer.tickEntities(WorldServer.java:682) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:921) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1612]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1612]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.NullPointerException
[00:36:41 INFO]: Leftah issued server command: /tell FeatherStones ti interessa lo spawner di ghast