17:03:50 [SEVERE] Could not pass event PlayerDeathEvent to OITC v1.7
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
        at org.bukkit.craftbukkit.v1_6_R2.event.CraftEventFactory.callPlayerDeathEvent(CraftEventFactory.java:344)
        at net.minecraft.server.v1_6_R2.EntityPlayer.die(EntityPlayer.java:307)
        at net.minecraft.server.v1_6_R2.EntityLiving.damageEntity(EntityLiving.java:709)
        at net.minecraft.server.v1_6_R2.EntityHuman.damageEntity(EntityHuman.java:714)
        at net.minecraft.server.v1_6_R2.EntityPlayer.damageEntity(EntityPlayer.java:378)
        at net.minecraft.server.v1_6_R2.EntityArrow.l_(EntityArrow.java:229)
        at net.minecraft.server.v1_6_R2.World.entityJoinedWorld(World.java:1354)
        at net.minecraft.server.v1_6_R2.World.playerJoinedWorld(World.java:1335)
        at net.minecraft.server.v1_6_R2.World.tickEntities(World.java:1223)
        at net.minecraft.server.v1_6_R2.WorldServer.tickEntities(WorldServer.java:480)
        at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:572)
        at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
        at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
        at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
        at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.NullPointerException
        at com.markyshuk.OITC.Arena.checkLives(Arena.java:267)
        at com.markyshuk.OITC.GameListeners.onDeath(GameListeners.java:178)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
        ... 18 more