[13:28:58] [Server thread/ERROR]: Could not pass event InventoryOpenEvent to SimpleShop v1.0
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:729) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.EntityPlayer.openContainer(EntityPlayer.java:663) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.BlockChest.interact(SourceFile:339) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.PlayerInteractManager.interact(PlayerInteractManager.java:496) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:759) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:52) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:1) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_91]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_91]
	at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [minecraft_server.jar:git-Spigot-06ad352-4a7472d]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]
Caused by: java.lang.NullPointerException