0:42:52] [Server thread/ERROR]: Could not pass event InventoryClickEvent to RandomCommand v0.5 DEV
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-f950f8e-4d99fed]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-f950f8e-4d99fed]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:1835) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.PacketPlayInWindowClick.a(SourceFile:33) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.PacketPlayInWindowClick.a(SourceFile:10) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_91]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_91]
	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:739) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574) [spigot.jar:git-Spigot-f950f8e-4d99fed]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
Caused by: java.lang.NullPointerException
	at net.snailz.randomcommand.GUI.onInventoryClick(GUI.java:208) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot.jar:git-Spigot-f950f8e-4d99fed]
	... 15 more