CreeperHeal Problem

12:52:13 [WARNING] [CreeperHeal] Missing message property : warn-spawn-eggs
12:52:13 [WARNING] [CreeperHeal] [CreeperHeal] Wrong variable used in message wa
rn-spawn-eggs
12:52:13 [WARNING] [CreeperHeal] Missing message property : warn-spawn-eggs
12:52:13 [WARNING] [CreeperHeal] [CreeperHeal] Wrong variable used in message wa
rn-spawn-eggs
12:52:13 [SEVERE] Could not pass event PlayerInteractEvent to CreeperHeal v6.3.6

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.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callPlayerInte
ractEvent(CraftEventFactory.java:186)
        at net.minecraft.server.v1_5_R3.PlayerInteractManager.interact(PlayerInt
eractManager.java:370)
        at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java
:631)
        at net.minecraft.server.v1_5_R3.Packet15Place.handle(SourceFile:58)
        at net.minecraft.server.v1_5_R3.NetworkManager.b(NetworkManager.java:292
)
        at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java
:109)
        at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)
        at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:3
0)
        at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:5
81)
        at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:2
26)
        at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:4
77)
        at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java
:410)
        at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:5
73)
Caused by: java.lang.NullPointerException
        at org.bukkit.craftbukkit.v1_5_R3.TextWrapper.wrapText(TextWrapper.java:
10)
        at net.minecraft.server.v1_5_R3.PlayerConnection.sendPacket(PlayerConnec
tion.java:724)
        at net.minecraft.server.v1_5_R3.PlayerConnection$$EnhancerByCGLIB$$d29ae
bd0.CGLIB$sendPacket$26(<generated>)
        at net.minecraft.server.v1_5_R3.PlayerConnection$$EnhancerByCGLIB$$d29ae
bd0$$FastClassByCGLIB$$4968120e.invoke(<generated>)
        at com.comphenix.net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.
java:228)
        at com.comphenix.protocol.injector.player.NetworkServerInjector$1.interc
ept(NetworkServerInjector.java:168)
        at net.minecraft.server.v1_5_R3.PlayerConnection$$EnhancerByCGLIB$$d29ae
bd0.sendPacket(<generated>)
        at org.bukkit.craftbukkit.v1_5_R3.entity.CraftPlayer.sendRawMessage(Craf
tPlayer.java:131)
        at org.bukkit.craftbukkit.v1_5_R3.entity.CraftPlayer.sendMessage(CraftPl
ayer.java:136)
        at com.nitnelave.CreeperHeal.utils.CreeperMessenger.warn(CreeperMessenge
r.java:186)
        at com.nitnelave.CreeperHeal.listeners.GriefListener.onPlayerInteract(Gr
iefListener.java:172)
        at sun.reflect.GeneratedMethodAccessor73.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)
        ... 16 more