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java.lang.NullPointerException: 	at com.bimmr.mcinfected.MenuManager.openKitsGUI(MenuManager.java:79)	at com.bimmr.mcinfected.Command.KitCommand.execute(KitCommand.java:74)	at me.bimmr.bimmcore.commands.CommandHandler.onCommand(CommandHandler.java:68)	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:640)	at org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer.performCommand(CraftPlayer.java:243)	at com.bimmr.mcinfectedlobbyitems.Listeners.onClick(Listeners.java:49)	at sun.reflect.GeneratedMethodAccessor125.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487)	at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:227)	at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:194)	at net.minecraft.server.v1_8_R3.PlayerInteractManager.a(PlayerInteractManager.java:107)	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:626)	at net.minecraft.server.v1_8_R3.PacketPlayInBlockDig.a(SourceFile:40)	at net.minecraft.server.v1_8_R3.PacketPlayInBlockDig.a(SourceFile:10)	at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at net.minecraft.server.v1_8_R3.SystemUtils.a(SystemUtils.java:19)	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:771)	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378)	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:710)	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:613)	at java.lang.Thread.run(Thread.java:745)