[21:17:30 INFO]: iAmGuus issued server command: /rank iAmGuus set GOLD 1month
[21:17:30 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'rank
' in plugin Tenrin v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[cus
tom.jar:git-Spigot-1649]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
1) ~[custom.jar:git-Spigot-1649]
        at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServe
r.java:767) ~[custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerCon
nection.java:1043) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java
:880) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java
:28) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat
.java:65) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186
) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java
:81) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:7
34) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:2
89) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:5
84) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java
:490) [custom.jar:git-Spigot-1649]
        at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:6
28) [custom.jar:git-Spigot-1649]
Caused by: java.lang.NullPointerException
        at me.iamguus.tenrin.storage.StorageUtils.setRank(StorageUtils.java:67)
~[?:?]
        at me.iamguus.tenrin.ranks.RankCommands.onCommand(RankCommands.java:31)
~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[cus
tom.jar:git-Spigot-1649]
        ... 13 more