Authme_error

20:20:31 [SEVERE] Could not pass event PlayerCommandPreprocessEvent to AuthMe v2
.7.10
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:427)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:462)
        at org.zonedabone.commandsigns.handler.CommandHandler.run(CommandHandler
.java:110)
        at org.zonedabone.commandsigns.handler.CommandHandler.handle(CommandHand
ler.java:43)
        at org.zonedabone.commandsigns.SignExecutor.runLines(SignExecutor.java:2
32)
        at org.zonedabone.commandsigns.ClickHandler.onInteract(ClickHandler.java
:146)
        at org.zonedabone.commandsigns.listener.EventListener.onPlayerInteract(E
ventListener.java:59)
        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
va:425)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:462)
        at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callPlayerInte
ractEvent(CraftEventFactory.java:178)
        at net.minecraft.server.v1_4_R1.PlayerInteractManager.interact(PlayerInt
eractManager.java:376)
        at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java
:657)
        at net.minecraft.server.v1_4_R1.Packet15Place.handle(SourceFile:58)
        at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290
)
        at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java
:113)
        at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
        at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:3
0)
        at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:5
98)
        at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:2
24)
        at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:4
94)
        at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java
:427)
        at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:8
49)
Caused by: java.lang.ClassCastException: org.zonedabone.commandsigns.proxy.Playe
rProxy cannot be cast to org.bukkit.craftbukkit.v1_4_R1.entity.CraftEntity
        at net.citizensnpcs.resources.npclib.NPCList.getNPC(NPCList.java:17)
        at net.citizensnpcs.resources.npclib.NPCManager.isNPC(NPCManager.java:89
)
        at net.citizensnpcs.api.CitizensManager.isNPC(CitizensManager.java:64)
        at uk.org.whoami.authme.plugin.manager.CitizensCommunicator.isNPC(Citize
nsCommunicator.java:20)
        at uk.org.whoami.authme.listener.AuthMePlayerListener.onPlayerCommandPre
process(AuthMePlayerListener.java:101)
        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
va:425)
        ... 29 more