[17:46:03] [Server thread/ERROR]: Could not pass event InventoryOpenEvent to FastCraft v15
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-e497721-96d09e3]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-e497721-96d09e3]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-e497721-96d09e3]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-e497721-96d09e3]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:714) [spigot.jar:git-Spigot-e497721-96d09e3]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:700) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.EntityPlayer.openTileEntity(EntityPlayer.java:636) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.BlockWorkbench.interact(SourceFile:28) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.PlayerInteractManager.interact(PlayerInteractManager.java:496) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:724) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:50) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:80) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-e497721-96d09e3]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_65]
	at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_65]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:683) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623) [spigot.jar:git-Spigot-e497721-96d09e3]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:526) [spigot.jar:git-Spigot-e497721-96d09e3]
	at java.lang.Thread.run(Thread.java:745) [?:1.7.0_65]
Caused by: java.lang.NullPointerException
	at me.bw.fastcraft.FastCraftInv.updateInv(FastCraftInv.java:116) ~[?:?]
	at me.bw.fastcraft.InventoryManager.onInventoryOpen(InventoryManager.java:82) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor512.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_65]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_65]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-e497721-96d09e3]
	... 19 more