[21:57:39 ERROR]: Could not pass event PlayerInteractEvent to CrateKey v1.0.9
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:226) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.PlayerInteractManager.interact(PlayerInteractManager.java:463) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:738) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:52) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:1) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_45]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_45]
        at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:710) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45]
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
        at org.bukkit.craftbukkit.v1_8_R2.inventory.CraftInventoryCustom$MinecraftInventory.setItem(CraftInventoryCustom.java:105) ~[spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at org.bukkit.craftbukkit.v1_8_R2.inventory.CraftInventory.setItem(CraftInventory.java:79) ~[spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        at me.picknchew.cratekey.utils.Utils.openCrate(Utils.java:186) ~[?:?]
        at me.picknchew.cratekey.CrateKey.onPlayerInteract(CrateKey.java:345) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor253.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_45]
        at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_45]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-4c7d0c0-7d020a7]
        ... 17 more