[18:50:16] [Server thread/ERROR]: Could not pass event BlockDamageEvent to AutomaticInventory v2.8.4
org.bukkit.event.EventException: null
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:309) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at org.bukkit.craftbukkit.v1_13_R2.event.CraftEventFactory.callBlockDamageEvent(CraftEventFactory.java:362) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.PlayerInteractManager.a(PlayerInteractManager.java:179) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:1162) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.PacketPlayInBlockDig.a(SourceFile:40) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.PacketPlayInBlockDig.a(SourceFile:10) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:9) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_202]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_202]
    at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199) [spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:896) [spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417) [spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:831) [spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:729) [spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
Caused by: java.lang.NullPointerException
    at me.ryanhamshire.AutomaticInventory.AutomaticInventory.getSignature(AutomaticInventory.java:404) ~[?:?]
    at me.ryanhamshire.AutomaticInventory.AutomaticInventory.depositMatching(AutomaticInventory.java:346) ~[?:?]
    at me.ryanhamshire.AutomaticInventory.AIEventHandler.onBlockDamage(AIEventHandler.java:271) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor334.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_202]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_202]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot-1.13.2March13th.jar:git-Spigot-3cb9dcb-8d8475f]
    ... 17 more