01:05:21 [WARNING] [MobArena] Task #263 for MobArena v0.95.5.22 generated an exception
java.lang.IndexOutOfBoundsException: No group 1
        at java.util.regex.Matcher.start(Matcher.java:374)
        at java.util.regex.Matcher.appendReplacement(Matcher.java:831)
        at java.util.regex.Matcher.replaceAll(Matcher.java:906)
        at java.lang.String.replaceAll(String.java:2162)
        at com.garbagemule.MobArena.Msg.format(Msg.java:97)
        at com.garbagemule.MobArena.Messenger.tell(Messenger.java:33)
        at com.garbagemule.MobArena.MASpawnThread.addReward(MASpawnThread.java:325)
        at com.garbagemule.MobArena.MASpawnThread.grantRewards(MASpawnThread.java:281)
        at com.garbagemule.MobArena.MASpawnThread.run(MASpawnThread.java:100)
        at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftTask.run(CraftTask.java:58)
        at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
        at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:518)
        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)