error pvp arena

17:13:38 [INFO] [PA-debug] Spawn null : freelounge
17:13:48 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'pa' in plugin pvparena v0.8.10.8

        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)

        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)

        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:479)

        at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:821)

        at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:781)

        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:764)

        at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:106)

        at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:34)

        at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)

        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)

        at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:172)

        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)

        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:567)

        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)

        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Caused by: java.lang.NullPointerException

        at net.slipcor.pvparena.modules.economy.EconomySupport.resetPlayer(EconomySupport.java:425)

        at net.slipcor.pvparena.neworder.ArenaModuleManager.resetPlayer(ArenaModuleManager.java:592)

        at net.slipcor.pvparena.arena.Arena.resetPlayer(Arena.java:854)

        at net.slipcor.pvparena.arena.Arena.removePlayer(Arena.java:758)

        at net.slipcor.pvparena.arena.Arena.playerLeave(Arena.java:571)

        at net.slipcor.pvparena.command.PAALeave.commit(PAALeave.java:26)

        at net.slipcor.pvparena.PVPArena.onCommand(PVPArena.java:143)

        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)

        ... 14 more