Solved Survival Games Error

Whenever I try and join my arena, (/sg join 1) this error comes up, however once the arena has been tried to join 8 times (thats the amount of slots in it) instead of shooting this error, it says arena 1 is full.
Also, when I set a lobby wall, the signs are just blank.

Code:

2013-04-15 05:19:38 [INFO] BestTr0ll issued server command: /sg join 1
2013-04-15 05:19:38 [SEVERE] java.lang.IllegalArgumentException: Name cannot be null
2013-04-15 05:19:38 [SEVERE] at org.apache.commons.lang.Validate.notNull(Validate.java:203)
2013-04-15 05:19:38 [SEVERE] at org.bukkit.craftbukkit.v1_5_R2.CraftServer.getWorld(CraftServer.java:819)
2013-04-15 05:19:38 [SEVERE] at org.bukkit.Bukkit.getWorld(Bukkit.java:169)
2013-04-15 05:19:38 [SEVERE] at com.skitscape.survivalgames.SettingsManager.getLobbySpawn(SettingsManager.java:149)
2013-04-15 05:19:38 [SEVERE] at com.skitscape.survivalgames.Game.addPlayer(Game.java:147)
2013-04-15 05:19:38 [SEVERE] at com.skitscape.survivalgames.GameManager.addPlayer(GameManager.java:200)
2013-04-15 05:19:38 [SEVERE] at com.skitscape.survivalgames.commands.Join.onCommand(Join.java:16)
2013-04-15 05:19:38 [SEVERE] at com.skitscape.survivalgames.CommandHandler.onCommand(CommandHandler.java:122)
2013-04-15 05:19:38 [SEVERE] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
2013-04-15 05:19:38 [SEVERE] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)
2013-04-15 05:19:38 [SEVERE] at org.bukkit.craftbukkit.v1_5_R2.CraftServer.dispatchCommand(CraftServer.java:523)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.PlayerConnection.handleCommand(PlayerConnection.java:966)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.PlayerConnection.chat(PlayerConnection.java:884)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.PlayerConnection.a(PlayerConnection.java:841)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.Packet3Chat.handle(Packet3Chat.java:44)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.NetworkManager.b(NetworkManager.java:292)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.PlayerConnection.d(PlayerConnection.java:110)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.ServerConnection.b(SourceFile:35)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.DedicatedServerConnection.b(SourceFile:30)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.MinecraftServer.r(MinecraftServer.java:580)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.DedicatedServer.r(DedicatedServer.java:225)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.MinecraftServer.q(MinecraftServer.java:476)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:409)
2013-04-15 05:19:38 [SEVERE] at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)

 

Can you post your configuration file(s) of SG? And first please try to give your arena a name different than just 1, maybe "arena1" or so

 

The configuration files are default. I already tried deleting the folder and reloading.

 

Okay, but why would you be able to join an arena called '1' if the files are default? Or did you set it up already?

 

Have you actually set the arena up..

 

Yes. I forgot to mention that.
JWhy The files are default other then the arena being set up, a.k.a the configuration files you asked for are default.

I could try this, but it always worked with "1" in the past.

 

Have you set the lobbyspawn & Lobbywall?

 

Okay. So I re downloaded the plugin and removed the folder therefor re-installing it, and it works now for whatever reason. Thanks.