09:52:05 [SEVERE] Could not pass event InventoryOpenEvent to AntiGuest
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:303)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:441)
        at org.bukkit.craftbukkit.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:474)
        at net.minecraft.server.EntityPlayer.startCrafting(EntityPlayer.java:477)
        at net.minecraft.server.BlockWorkbench.interact(SourceFile:24)
        at net.minecraft.server.ItemInWorldManager.interact(ItemInWorldManager.java:294)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:723)
        at net.minecraft.server.Packet15Place.handle(SourceFile:39)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:116)
        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:554)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
Caused by: java.lang.NullPointerException
        at net.minecraft.server.InventoryCrafting.getOwner(InventoryCrafting.java:47)
        at org.bukkit.craftbukkit.inventory.CraftInventory.getHolder(CraftInventory.java:413)
        at de.codeinfection.quickwango.AntiGuest.Preventions.Bukkit.ChestPrevention.handle(ChestPrevention.java:56)
        at sun.reflect.GeneratedMethodAccessor155.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301)
        ... 14 more