[18:00:46 ERROR]: Could not pass event PlayerItemHeldEvent to Luna v1.0
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[patched_1.8.8.jar:git-PaperSpigot-445]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched_1.8.8.jar:git-PaperSpigot-445]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.8.8.jar:git-PaperSpigot-445]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:517) [patched_1.8.8.jar:git-PaperSpigot-445]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:502) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:935) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.PacketPlayInHeldItemSlot.a(SourceFile:30) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.PacketPlayInHeldItemSlot.a(SourceFile:8) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [patched_1.8.8.jar:git-PaperSpigot-445]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_282]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_282]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:774) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [patched_1.8.8.jar:git-PaperSpigot-445]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [patched_1.8.8.jar:git-PaperSpigot-445]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
Caused by: java.lang.NullPointerException
        at it.zerotwo.luna.Listener.Item.onHeld(Item.java:26) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_282]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_282]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_282]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_282]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[patched_1.8.8.jar:git-PaperSpigot-445]
        ... 16 more