xteam error

2013-03-03 17:50:26 [INFO] player issued server command: /team sethq
2013-03-03 17:50:35 [INFO] player issued server command: /team hq
2013-03-03 17:50:35 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'team' in plugin xTeam v1.7.3
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:514)
at net.minecraft.server.v1_4_R1.PlayerConnection.handleCommand(PlayerConnection.java:980)
at net.minecraft.server.v1_4_R1.PlayerConnection.chat(PlayerConnection.java:898)
at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:853)
at com.bergerkiller.bukkit.common.internal.CommonPacketListener.a(CommonPacketListener.java:355)
at net.minecraft.server.v1_4_R1.Packet3Chat.handle(Packet3Chat.java:44)
at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
at me.protocos.xTeam.Core.Functions.isEnemy(Functions.java:71)
at me.protocos.xTeam.Commands.TeamUser.TeamUserCmdHQ.hq(TeamUserCmdHQ.java:84)
at me.protocos.xTeam.Commands.TeamUser.TeamUserCmdHQ.execute(TeamUserCmdHQ.java:30)
at me.protocos.xTeam.xTeam.onCommand(xTeam.java:257)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
... 16 more
2013-03-03 17:50:48 [INFO] /103.23.148.222:64268 lost connection
2013-03-03 17:50:52 [INFO] player: why does it say an error occured when i do /team hq?
2013-03-03 17:50:59 [INFO] player issued server command: /team sethq
2013-03-03 17:51:02 [INFO] player issued server command: /team hq
2013-03-03 17:51:05 [INFO] player: ok dw