Could not pass event BlockBreakEvent to mcMMO
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:460)
        at net.minecraft.server.ItemInWorldManager.breakBlock(ItemInWorldManager.java:220)
        at net.minecraft.server.ItemInWorldManager.a(ItemInWorldManager.java:175)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:540)
        at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:132)
        at net.minecraft.server.Packet14BlockDig.handle(SourceFile:43)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
        at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:172)
        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:567)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
        at com.gmail.nossr50.spout.SpoutStuff.updateXpBar(SpoutStuff.java:581)
        at com.gmail.nossr50.util.Skills.XpCheckSkill(Skills.java:241)
        at com.gmail.nossr50.skills.gathering.Mining.miningXP(Mining.java:279)
        at com.gmail.nossr50.skills.gathering.Mining.miningBlockCheck(Mining.java:293)
        at com.gmail.nossr50.listeners.BlockListener.onBlockBreak(BlockListener.java:167)
        at sun.reflect.GeneratedMethodAccessor139.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.java:302)
        ... 14 more