[18:21:14] [Server thread/ERROR]: Could not pass event EntityDamageByEntityEvent to Disease v1.5.1
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[towny.jar:git-Spigot-dbe012b-61ef214]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[towny.jar:git-Spigot-dbe012b-61ef214]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [towny.jar:git-Spigot-dbe012b-61ef214]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [towny.jar:git-Spigot-dbe012b-61ef214]
	at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callEvent(CraftEventFactory.java:85) [towny.jar:git-Spigot-dbe012b-61ef214]
	at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:538) [towny.jar:git-Spigot-dbe012b-61ef214]
	at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:451) [towny.jar:git-Spigot-dbe012b-61ef214]
	at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:570) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.EntityLiving.d(EntityLiving.java:1101) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.EntityHuman.d(EntityHuman.java:859) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.EntityLiving.damageEntity(EntityLiving.java:742) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.EntityHuman.damageEntity(EntityHuman.java:800) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.EntityPlayer.damageEntity(EntityPlayer.java:496) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.citizensnpcs.npc.entity.EntityHumanNPC.damageEntity(EntityHumanNPC.java:95) [citizens-2.0.15-SNAPSHOT.jar:?]
	at net.minecraft.server.v1_8_R2.EntityHuman.attack(EntityHuman.java:1001) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.EntityPlayer.attack(EntityPlayer.java:1060) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:1343) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.PacketPlayInUseEntity.a(SourceFile:52) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.PacketPlayInUseEntity.a(SourceFile:11) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [towny.jar:git-Spigot-dbe012b-61ef214]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_25]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_25]
	at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:710) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [towny.jar:git-Spigot-dbe012b-61ef214]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [towny.jar:git-Spigot-dbe012b-61ef214]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
Caused by: java.lang.NullPointerException
	at com.hmmcrunchy.disease.Disease.playerHitEvent(Disease.java:3892) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor441.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_25]
	at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_25]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[towny.jar:git-Spigot-dbe012b-61ef214]
	... 27 more