EZRanksLite Start-up Console Error

[16:32:10] [Server thread/INFO]: [EZRanksLite] Enabling EZRanksLite v1.6.1
[16:32:10] [Server thread/ERROR]: [EZRanksLite] EZRanksLite hooked into Essentials!!
[16:32:10] [Server thread/INFO]: [EZRanksLite] Loading EZRanksLite messages.yml
[16:32:10] [Server thread/ERROR]: Error occurred while enabling EZRanksLite v1.6.1 (Is it up to date?)
java.lang.NoSuchMethodError: ru.tehkode.permissions.PermissionManager.getGroupList()Ljava/util/List;
	at net.milkbowl.vault.permission.plugins.Permission_PermissionsEx.getGroups(Permission_PermissionsEx.java:372) ~[?:?]
	at me.clip.ezrankslite.hooks.VaultPerms.getServerGroups(VaultPerms.java:69) ~[?:?]
	at me.clip.ezrankslite.hooks.VaultPerms.isValidGroup(VaultPerms.java:74) ~[?:?]
	at me.clip.ezrankslite.hooks.Hooks.isValidServerGroup(Hooks.java:78) ~[?:?]
	at me.clip.ezrankslite.rankdata.RankupFile.loadRankupsFromFile(RankupFile.java:286) ~[?:?]
	at me.clip.ezrankslite.EZRanksLite.onEnable(EZRanksLite.java:163) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:316) ~[spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:412) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugin(CraftServer.java:476) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.enablePlugins(CraftServer.java:394) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at net.minecraft.server.v1_7_R4.MinecraftServer.n(MinecraftServer.java:360) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at net.minecraft.server.v1_7_R4.MinecraftServer.g(MinecraftServer.java:334) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at net.minecraft.server.v1_7_R4.MinecraftServer.a(MinecraftServer.java:290) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at net.minecraft.server.v1_7_R4.DedicatedServer.init(DedicatedServer.java:210) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:458) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot1.jar:git-Spigot-1.7.9-R0.2-205-g6a8d903]