[22:58:16] [Server thread/ERROR]: Could not pass event MobHuntKillEvent to MobHunting v2.8.6
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at one.lindegaard.MobHunting.MobHunting.onMobDeath(MobHunting.java:848) [MobHunting2.8.6.jar:?]
	at sun.reflect.GeneratedMethodAccessor457.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_66]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:378) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.EntityLiving.die(EntityLiving.java:874) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.EntityLiving.damageEntity(EntityLiving.java:812) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.EntityHuman.attack(EntityHuman.java:1001) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.EntityPlayer.attack(EntityPlayer.java:1063) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1355) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PacketPlayInUseEntity.a(SourceFile:52) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PacketPlayInUseEntity.a(SourceFile:11) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_66]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_66]
	at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [Spigot188.jar:git-Spigot-db6de12-18fbb24]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_66]
Caused by: java.lang.NullPointerException
	at one.lindegaard.MobHunting.MobHuntingManager.getOnlinePlayers(MobHuntingManager.java:72) ~[?:?]
	at one.lindegaard.MobHunting.achievements.AchievementManager.broadcast(AchievementManager.java:230) ~[?:?]
	at one.lindegaard.MobHunting.achievements.AchievementManager.awardAchievement(AchievementManager.java:262) ~[?:?]
	at one.lindegaard.MobHunting.achievements.ByTheBook.onKill(ByTheBook.java:38) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor500.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_66]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[Spigot188.jar:git-Spigot-db6de12-18fbb24]
	... 28 more