ar bug

[16:40:40] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to Autorank v3.3
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:509) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:494) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.PlayerList.c(PlayerList.java:265) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.PlayerList.a(PlayerList.java:152) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.LoginListener.c(LoginListener.java:119) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.LoginListener.a(LoginListener.java:44) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:189) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
Caused by: java.lang.NullPointerException
	at me.armar.plugins.autorank.requirementhandler.RequirementHandler.getCompletedRanks(RequirementHandler.java:131) ~[?:?]
	at me.armar.plugins.autorank.playerchecker.RankChange.checkRequirements(RankChange.java:71) ~[?:?]
	at me.armar.plugins.autorank.playerchecker.RankChange.applyChange(RankChange.java:35) ~[?:?]
	at me.armar.plugins.autorank.playerchecker.PlayerChecker.checkPlayer(PlayerChecker.java:64) ~[?:?]
	at me.armar.plugins.autorank.listeners.PlayerJoinListener.onPlayerJoin(PlayerJoinListener.java:35) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_51]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_51]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_51]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_51]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:298) ~[spigot1652.jar:git-Spigot-1.7.9-R0.2-205-g2c31986]
	... 14 more