NullPointerException in Teleport when trying to join arena

I just started getting this error when joining an arena in Hunger Games.

Code:

06:43:39 [INFO] bjcarms issued server command: /sg join 1
06:43:39 [SEVERE] java.lang.NullPointerException
06:43:40 [SEVERE]      at org.bukkit.craftbukkit.v1_6_R2.entity.CraftPlayer.teleport(CraftPlayer.java:395)
06:43:40 [SEVERE]      at org.bukkit.craftbukkit.v1_6_R2.entity.CraftEntity.teleport(CraftEntity.java:199)
06:43:40 [SEVERE]      at org.mcsg.survivalgames.Game.addPlayer(Game.java:235)
06:43:40 [SEVERE]      at org.mcsg.survivalgames.GameManager.addPlayer(GameManager.java:246)
06:43:40 [SEVERE]      at org.mcsg.survivalgames.commands.Join.onCommand(Join.java:19)
06:43:40 [SEVERE]      at org.mcsg.survivalgames.CommandHandler.onCommand(CommandHandler.java:164)
06:43:40 [SEVERE]      at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
06:43:40 [SEVERE]      at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:191)
06:43:40 [SEVERE]      at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServer.java:523)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.PlayerConnection.handleCommand(PlayerConnection.java:962)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.PlayerConnection.chat(PlayerConnection.java:880)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java:837)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.Packet3Chat.handle(SourceFile:49)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.NetworkManager.b(NetworkManager.java:296)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java:116)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.DedicatedServerConnection.b(SourceFile:30)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:590)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
06:43:40 [SEVERE]      at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
06:43:56 [INFO] Connection reset

This is what the server posts on startup:
...\Minecraft server\craftbukkit-1.6.2-R0.1.jar"
06:56:48 [INFO] Starting minecraft server version 1.6.2
06:56:48 [INFO] Loading properties
06:56:48 [INFO] Default game type: CREATIVE
06:56:48 [INFO] Generating keypair
06:56:48 [INFO] Starting Minecraft server on 192.168.0.7:25565
06:56:48 [INFO] This server is running CraftBukkit version git-Bukkit-1.6.2-R0.1
-b2838jnks (MC: 1.6.2) (Implementing API version 1.6.2-R0.1)
06:56:48 [INFO] [PermissionsEx] sql backend registered!
06:56:48 [INFO] [PermissionsEx] file backend registered!
06:56:48 [INFO] [WorldEdit] Loading WorldEdit v5.5.8
06:56:48 [INFO] [PermissionsEx] Loading PermissionsEx v1.20.2
06:56:48 [INFO] [PermissionsEx] Initializing file backend
06:56:48 [INFO] Permissions file successfully reloaded
06:56:48 [INFO] [SurvivalGames] Loading SurvivalGames v0.5.8.54
06:56:48 [INFO] Preparing level "HolidayResort"
06:56:49 [INFO] Preparing start region for level 0 (Seed: 4431064177836963840)
06:56:50 [INFO] Preparing spawn area: 98%
06:56:50 [INFO] Preparing start region for level 1 (Seed: 4431064177836963840)
06:56:50 [INFO] Preparing start region for level 2 (Seed: -4484687029548591279)
06:56:50 [INFO] [WorldEdit] Enabling WorldEdit v5.5.8
06:56:51 [INFO] WEPIF: Using the Bukkit Permissions API.
06:56:51 [INFO] [PermissionsEx] Enabling PermissionsEx v1.20.2
06:56:51 [INFO] WEPIF: PermissionsEx detected! Using PermissionsEx for permissio
ns.
06:56:51 [INFO] [SurvivalGames] Enabling SurvivalGames v0.5.8.54
06:56:51 [INFO] METRICS STARTING
06:56:51 [INFO] Done (2.309s)! For help, type "help" or "?"

I had this working, and then I think I took a Java update and it stopped. I uninstalled that update but it didn't help. My Java version is (build 1.7.0_45-b18).

My PermissionsEx Permissions.yml file looks like this, I don't have anything else in the file hoping that simpler is better for troubleshooting:
groups:
default:
default: true
permissions:
- sg.arena.join
- sg.arena.join.1
- sg.lobby.join
- sg.arena.enable
- sg.arena.disable
users:
username:
group:
- default

The only way previously I could get anyone to join arena 1 was to have 'sg.arena.join' and 'sg.arena.join.1' both. If I have just one of them I get a message that I don't have permission to use the command when I do /sg join 1 in game.

Any ideas?

Thanks