cred

[12:05:57 INFO]: Cellan issued server command: /cred buy
[12:05:57 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'cred' in plugin Credits v0.3
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:175) ~[craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:683) ~[craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:952) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:814) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:47) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
Caused by: java.lang.NullPointerException
        at me.stashcat.Credits.showMenu(Credits.java:371) ~[?:?]
        at me.stashcat.Credits.onCommand(Credits.java:170) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-dev-3023.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
        ... 13 more