faction

Could not pass event CreatureSpawnEvent to Factions v2.5.0
org.bukkit.event.EventException
	at us.Myles.PWP.TransparentListeners.PerWorldPluginLoader$1.execute(PerWorldPluginLoader.java:122) ~[?:?]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1627]
	at us.Myles.PWP.TransparentListeners.PWPRegisteredListener.callEvent(PWPRegisteredListener.java:30) [PerWorldPlugins.jar:?]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-1627]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-1627]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:291) [spigot.jar:git-Spigot-1627]
	at net.minecraft.server.v1_7_R4.World.addEntity(World.java:1095) [spigot.jar:git-Spigot-1627]
	at net.citizensnpcs.npc.CitizensNPC.spawn(CitizensNPC.java:172) [citizens-2.0.13-SNAPSHOT.jar:?]
	at net.aufdemrand.sentry.SentryInstance$SentryLogic.run(SentryInstance.java:1435) [sentry.jar:?]
	at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask.run(CraftTask.java:71) [spigot.jar:git-Spigot-1627]
	at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-1627]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:641) [spigot.jar:git-Spigot-1627]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot.jar:git-Spigot-1627]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1627]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1627]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1627]
Caused by: java.lang.IllegalArgumentException: Yaw should not be NaN!
	at com.massivecraft.massivecore.ps.PS.throwIfStrange(PS.java:274) ~[?:?]
	at com.massivecraft.massivecore.ps.PS.<init>(PS.java:256) ~[?:?]
	at com.massivecraft.massivecore.ps.PS.valueOf(PS.java:293) ~[?:?]
	at com.massivecraft.massivecore.ps.PS.valueOf(PS.java:305) ~[?:?]
	at com.massivecraft.factions.listeners.FactionsListenerMain.blockMonsters(FactionsListenerMain.java:549) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor56.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_55]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_55]
	at us.Myles.PWP.TransparentListeners.PerWorldPluginLoader$1.execute(PerWorldPluginLoader.java:120) ~[?:?]
	... 15 more