Erreur

[17:10:06 INFO]: =============================
[17:10:06 INFO]: UltimateKits 2.4.8 by Songoda <3!
[17:10:06 INFO]: Action: Enabling...
[17:10:09 INFO]: [UltimateKits] Loaded locale "en_US"
[17:10:10 INFO]: [SongodaCore] Hooked UltimateKits.
[17:10:11 ERROR]: Unexpected error while loading UltimateKits v2.4.8 c2.2.10: Disabling plugin!
java.lang.NoSuchMethodError: org.bukkit.inventory.meta.SkullMeta.setOwningPlayer(Lorg/bukkit/OfflinePlayer;)Z
        at com.earth2me.essentials.MetaItemStack.addStringMeta(MetaItemStack.java:181) ~[EssentialsX-2.17.1.0.jar:?]
        at com.earth2me.essentials.MetaItemStack.parseStringMeta(MetaItemStack.java:136) ~[EssentialsX-2.17.1.0.jar:?]
        at com.songoda.ultimatekits.conversion.hooks.EssentialsHook.getItems(EssentialsHook.java:33) ~[ultimatekits-2.4.8.jar:?]
        at com.songoda.ultimatekits.conversion.Convert.convertKits(Convert.java:45) ~[ultimatekits-2.4.8.jar:?]
        at com.songoda.ultimatekits.conversion.Convert.runKitConversions(Convert.java:25) ~[ultimatekits-2.4.8.jar:?]
        at com.songoda.ultimatekits.UltimateKits.onPluginEnable(UltimateKits.java:107) ~[ultimatekits-2.4.8.jar:?]
        at com.songoda.ultimatekits.core.SongodaPlugin.onEnable(SongodaPlugin.java:97) [ultimatekits-2.4.8.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:292) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.craftbukkit.v1_9_R2.CraftServer.loadPlugin(CraftServer.java:362) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.craftbukkit.v1_9_R2.CraftServer.enablePlugins(CraftServer.java:322) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.t(MinecraftServer.java:416) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.l(MinecraftServer.java:381) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.a(MinecraftServer.java:336) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.DedicatedServer.init(DedicatedServer.java:268) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:532) [spigot-1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
[17:10:11 INFO]: [UltimateKits] Disabling UltimateKits v2.4.8
[17:10:12 INFO]: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~