java.lang.IllegalArgumentException: Cannot set to an empty path
        at org.apache.commons.lang.Validate.notEmpty(Validate.java:363)
        at org.bukkit.configuration.MemorySection.set(MemorySection.java:156)
        at org.bukkit.configuration.MemorySection.set(MemorySection.java:186)
        at com.garbagemule.MobArena.util.config.Config.set(Config.java:345)
        at com.garbagemule.MobArena.log.YMLSessionBuilder.reset(YMLSessionBuilde
r.java:109)
        at com.garbagemule.MobArena.log.YMLSessionBuilder.<init>(YMLSessionBuild
er.java:28)
        at com.garbagemule.MobArena.ArenaImpl.<init>(ArenaImpl.java:174)
        at com.garbagemule.MobArena.ArenaMasterImpl.loadArena(ArenaMasterImpl.ja
va:519)
        at com.garbagemule.MobArena.ArenaMasterImpl.loadArenas(ArenaMasterImpl.j
ava:489)
        at com.garbagemule.MobArena.ArenaMasterImpl.initialize(ArenaMasterImpl.j
ava:242)
        at com.garbagemule.MobArena.MobArena.onEnable(MobArena.java:81)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:215)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:336)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:381)
        at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:256)
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:238
)
        at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:371)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:358)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:422)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)