HideAllPlayers error

[14:49:46] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to HideAllPlayers v2.0
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427) ~[spigot1.7.2R0.3:git-Spigot-1232]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot1.7.2R0.3:git-Spigot-1232]
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30) ~[spigot1.7.2R0.3:git-Spigot-1232]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:482) [spigot1.7.2R0.3:git-Spigot-1232]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:467) [spigot1.7.2R0.3:git-Spigot-1232]
	at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:208) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.PlayerInteractManager.interact(PlayerInteractManager.java:375) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:629) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.a(SourceFile:60) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.PacketPlayInBlockPlace.handle(SourceFile:9) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:147) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:657) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:540) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:446) [spigot1.7.2R0.3:git-Spigot-1232]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot1.7.2R0.3:git-Spigot-1232]
Caused by: java.lang.NullPointerException
	at me.arnofrutos.hideallplayers.main.onPlayerInteract(main.java:82) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor115.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_45]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_45]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425) ~[spigot1.7.2R0.3:git-Spigot-1232]
	... 16 more