Bukkit

i'm french sorry for my bad english i hope than you understand

i install .jar in my serveur and start , a bug produced what i enter /protect in game.
What is the expected output? What do you see instead?

i using a 1.7.2 rev0.3 spigot

[Server thread/ERROR]: Could not pass event PlayerInteractEvent to ChestProtect v2.5
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427) ~[spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30) ~[spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:482) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:467) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:208) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:178) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:1009) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.PacketPlayInArmAnimation.a(SourceFile:43) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.PacketPlayInArmAnimation.handle(SourceFile:9) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:147) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:657) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:540) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:446) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
Caused by: java.lang.NullPointerException
    at com.gmail.jordz98.MyBlockListener.onInventoryOpenEvent(MyBlockListener.java:106) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor77.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_25]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_25]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425) ~[spigot-1.7.2-R0.3-SNAPSHOT.jar:git-Spigot-1226]
    ... 16 more

don't have more informations for help you. good luck

up ?