Java error on server 1.8.8 [MythicArtifacts 1.6]

Hi all!
I have a real problem here, Mythic artifact generate a real problem on my server when it's enable:

Without MythicArtifacts, no problems appear, MythicMobs don't generate any error message and is fully functionnal:
--------------------------------------------------------------------------------------------------------------------------------------------

Code:

[10:04:12] [INFO] [MythicMobs] MythicMobs configuration file loaded successfully.
[10:04:12] [ERROR] [MythicMobs] Plugin MythicMobs v4.1.0-SNAPSHOT has failed to register events for class io.lumine.xikage.mythicmobs.adapters.bukkit.BukkitSkillTriggers because org/bukkit/event/entity/EnderDragonChangePhaseEvent does not exist.
[10:04:12] [INFO] [MythicMobs] v4.1.0-SNAPSHOT has been successfully loaded!

--------------------------------------------------------------------------------------------------------------------------------------------
But, when i instal MythicArtifacts, each actions generate errors message, and the plugin don't work anymore:

Code:

[10:11:54] [ERROR] Could not pass event InventoryCloseEvent to MythicArtifacts v0.1.6-SNAPSHOT
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleInventoryCloseEvent(CraftEventFactory.java:852) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1411) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PacketPlayInCloseWindow.a(PacketPlayInCloseWindow.java:18) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PacketPlayInCloseWindow.a(PacketPlayInCloseWindow.java:1) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_131]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_131]
at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.lang.NoSuchMethodError: org.bukkit.inventory.EntityEquipment.getItemInOffHand()Lorg/bukkit/inventory/ItemStack;
at io.lumine.xikage.mythicartifacts.profiles.Profile.parseArmor(Profile.java:329) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.getPlayerProfile(ProfileManager.java:42) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.onInventoryClose(ProfileManager.java:85) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_131]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
... 16 more
[10:11:55] [WARN] [MythicMobs] Task #333 for MythicMobs v4.1.0-SNAPSHOT generated an exception
java.lang.NoSuchMethodError: org.bukkit.inventory.EntityEquipment.getItemInOffHand()Lorg/bukkit/inventory/ItemStack;
at io.lumine.xikage.mythicartifacts.profiles.Profile.parseArmor(Profile.java:329) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.getPlayerProfile(ProfileManager.java:42) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.lambda$onChangeHeldItem$4(ProfileManager.java:90) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:723) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]

I'm on Spigot 1.8.8, I'm Using MythicMobs 4.10 and MythicArtifacts 1.6.0

Can someone help me to fix it please? MythicArtifacts and Mobs are the central point of my server and i can't use it for the moment.

 

use 4.0.1, 4.1 has problems in general with 1.8 servers

 

I tryed, that's why i post ^^

It's exaclty the same, look at by yourself:

Code:

[12:19:46] [ERROR] Could not pass event InventoryCloseEvent to MythicArtifacts v0.1.6-SNAPSHOT
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleInventoryCloseEvent(CraftEventFactory.java:852) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1411) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PacketPlayInCloseWindow.a(PacketPlayInCloseWindow.java:18) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PacketPlayInCloseWindow.a(PacketPlayInCloseWindow.java:1) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_131]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_131]
at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.lang.NoSuchMethodError: org.bukkit.inventory.EntityEquipment.getItemInOffHand()Lorg/bukkit/inventory/ItemStack;
at io.lumine.xikage.mythicartifacts.profiles.Profile.parseArmor(Profile.java:329) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.getPlayerProfile(ProfileManager.java:42) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.onInventoryClose(ProfileManager.java:85) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_131]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
... 16 more
[12:19:47] [WARN] [MythicMobs] Task #276 for MythicMobs v4.0.1 generated an exception
java.lang.NoSuchMethodError: org.bukkit.inventory.EntityEquipment.getItemInOffHand()Lorg/bukkit/inventory/ItemStack;
at io.lumine.xikage.mythicartifacts.profiles.Profile.parseArmor(Profile.java:329) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.getPlayerProfile(ProfileManager.java:42) ~[?:?]
at io.lumine.xikage.mythicartifacts.profiles.ProfileManager.lambda$onChangeHeldItem$4(ProfileManager.java:90) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:723) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [minecraft_server.jar:git-Spigot-21fe707-e1ebe52]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]

 

i guess artifacts is based on the combat system since 1.9

 

Yes i think too, but there are no precisions about it.

Maybe add a compability for 1.8? I have paid for it and can't use it cause of the incompability :/

 

I can't use this plugin for the same reason.
My users don't want a higher version.
Please add a compability for 1.8