Error

2:13:35 [SEVERE] Could not pass event PlayerInteractEvent to Kitpvp v1.0
rg.bukkit.event.EventException
       at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
a:341)
       at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
:62)
       at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
va:477)
       at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
va:462)
       at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEven
(CraftEventFactory.java:177)
       at net.minecraft.server.ItemInWorldManager.interact(ItemInWorldManager.j
va:355)
       at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:652)
       at net.minecraft.server.Packet15Place.handle(SourceFile:58)
       at net.minecraft.server.NetworkManager.b(NetworkManager.java:282)
       at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:111)
       at net.minecraft.server.ServerConnection.b(SourceFile:35)
       at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
       at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:561)
       at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
       at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
       at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
       at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
aused by: java.lang.IllegalArgumentException: Plugin cannot be null
       at org.apache.commons.lang.Validate.notNull(Validate.java:203)
       at org.bukkit.craftbukkit.scheduler.CraftScheduler.validate(CraftSchedul
r.java:391)
       at org.bukkit.craftbukkit.scheduler.CraftScheduler.runTaskTimer(CraftSch
duler.java:119)
       at org.bukkit.craftbukkit.scheduler.CraftScheduler.scheduleSyncRepeating
ask(CraftScheduler.java:115)
       at org.bukkit.craftbukkit.scheduler.CraftScheduler.scheduleSyncDelayedTa
k(CraftScheduler.java:99)
       at com.dyrocraft.kitpvp.MyDeathlistener.onPlayerInteractBlock(MyDeathlis
ener.java:23)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
       at java.lang.reflect.Method.invoke(Unknown Source)
       at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
a:339)
       ... 16 more