bug

> [21:58:28 ERROR]: Could not pass event EntityDamageByEntityEvent to StaffPlus v3.2.2org.bukkit.event.EventExceptionat org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callEvent(CraftEventFactory.java:87) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:553) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:466) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:585) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.EntityLiving.d(EntityLiving.java:1102) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.EntityHuman.d(EntityHuman.java:859) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.EntityLiving.damageEntity(EntityLiving.java:743) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.EntityHuman.damageEntity(EntityHuman.java:800) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.EntityPlayer.damageEntity(EntityPlayer.java:496) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.EntityHuman.attack(EntityHuman.java:1001) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.EntityPlayer.attack(EntityPlayer.java:1063) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.citizensnpcs.npc.ai.MCTargetStrategy$1.handle(MCTargetStrategy.java:209) [Citizens%20(1).jar:?]at net.citizensnpcs.npc.ai.MCTargetStrategy.update(MCTargetStrategy.java:129) [Citizens%20(1).jar:?]at net.citizensnpcs.npc.ai.CitizensNavigator.run(CitizensNavigator.java:134) [Citizens%20(1).jar:?]at net.citizensnpcs.npc.CitizensNPC.update(CitizensNPC.java:268) [Citizens%20(1).jar:?]at net.citizensnpcs.npc.entity.EntityHumanNPC.t_(EntityHumanNPC.java:339) [Citizens%20(1).jar:?]at net.minecraft.server.v1_8_R3.World.entityJoinedWorld(World.java:1607) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.World.g(World.java:1582) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.World.tickEntities(World.java:1425) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.WorldServer.tickEntities(WorldServer.java:597) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:786) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]Caused by: java.lang.NullPointerExceptionat net.shortninja.staffplus.server.listener.entity.EntityDamageByEntity.onDamage(EntityDamageByEntity.java:45) ~[?:?]at sun.reflect.GeneratedMethodAccessor201.invoke(Unknown Source) ~[?:?]at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_242]at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_242]at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot1.8.8.jar:git-Spigot-21fe707-e1ebe52]... 28 more