21:48:25 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'addlevels' in plugin mcMMO v1.4.07-dev1-b2140
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:190)
        at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServer.java:527)
        at net.minecraft.server.v1_6_R2.PlayerConnection.handleCommand(PlayerConnection.java:981)
        at net.minecraft.server.v1_6_R2.PlayerConnection.chat(PlayerConnection.java:892)
        at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java:839)
        at net.minecraft.server.v1_6_R2.Packet3Chat.handle(SourceFile:49)
        at org.spigotmc.netty.NettyNetworkManager.b(NettyNetworkManager.java:235)
        at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java:118)
        at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
        at org.spigotmc.netty.NettyServerConnection.b(NettyServerConnection.java:125)
        at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:592)
        at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:239)
        at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:481)
        at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:413)
        at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.NullPointerException
        at com.gmail.nossr50.events.experience.McMMOPlayerExperienceEvent.<init>(McMMOPlayerExperienceEvent.java:22)
        at com.gmail.nossr50.events.experience.McMMOPlayerLevelUpEvent.<init>(McMMOPlayerLevelUpEvent.java:19)
        at com.gmail.nossr50.commands.experience.AddlevelsCommand.handleCommand(AddlevelsCommand.java:28)
        at com.gmail.nossr50.commands.experience.ExperienceCommand.editValues(ExperienceCommand.java:165)
        at com.gmail.nossr50.commands.experience.ExperienceCommand.onCommand(ExperienceCommand.java:78)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
        ... 15 more
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