Problème d'Internal Error

Bonjour, je rencontre actuellement un problème avec mon serveur.

Lorsque je tape la commande "/ec open" pour le Plugin CustomEnderchest, il me met "an internal error occurred while attempting to perform this command"

18:01:47: NiKoLaYFoX issued server command: /ec open
18:01:47: null
org.bukkit.command.CommandException: Unhandled exception executing command 'ec' in plugin CustomEnderChest v1.11.3
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[minecraft_server.jar:git-Bukkit-acbc348]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[minecraft_server.jar:git-Bukkit-acbc348]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:628) ~[minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1340) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.vr_12_R1.PlayerConnection.a(PlayerConnection.java:1200) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:37) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:9) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [minecraft_server.jar:git-Bukkit-acbc348]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:696) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) [minecraft_server.jar:git-Bukkit-acbc348]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.NoSuchFieldError: BLOCK_ENDER_CHEST_OPEN
at net.craftersland.customenderchest.SoundHandler.sendEnderchestOpenSound(SoundHandler.java:47) ~[?:?]
at net.craftersland.customenderchest.utils.EnderChestUtils.openMenu(EnderChestUtils.java:130) ~[?:?]
at net.craftersland.customenderchest.CommandHandler.onCommand(CommandHandler.java:47) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[minecraft_server.jar:git-Bukkit-acbc348]
... 15 more

Il me fait la même chose pour le plugin Holographic Display lorsque je fais la commande
"/hd edit [Nom de l'HD a modifier] [Ligne a modifier] [Texte]"
(Il me fait pareil pour la commande "/hd help")

18:14:57: NiKoLaYFoX issued server command: /hd edit bonjour
18:14:57: null
org.bukkit.command.CommandException: Unhandled exception executing command 'hd' in plugin HolographicDisplays v2.3.2
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[minecraft_server.jar:git-Bukkit-acbc348]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[minecraft_server.jar:git-Bukkit-acbc348]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:628) ~[minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1340) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1200) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:37) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:9) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [minecraft_server.jar:git-Bukkit-acbc348]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:696) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) [minecraft_server.jar:git-Bukkit-acbc348]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) [minecraft_server.jar:git-Bukkit-acbc348]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.NoSuchMethodError: org.bukkit.entity.Player.spigot()Lorg/bukkit/entity/Player$Spigot;
at com.gmail.filoghost.holographicdisplays.commands.main.subs.EditCommand.execute(EditCommand.java:80) ~[?:?]
at com.gmail.filoghost.holographicdisplays.commands.main.HologramsCommandHandler.onCommand(HologramsCommandHandler.java:107) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[minecraft_server.jar:git-Bukkit-acbc348]
... 15 more

- ColoredTags
- CrazyEnchantements
- CustomEnderChest
- EssentialsX
- EssentialsXAntiBuild
- EssentialsXChat
- EssentialsXGeoIP
- EssentialsXProtect
- EssentialsXSpawn
- EssentialsXXMPP
- Factions
- HealthBar
- HolographicDisplay
- MassiveCore
- Multverse-Core
- PermissionEx
- RandomTeleport
- SuperVanish
- Vault
- WorldEdit
- WorldGuard

Le serveur est hébergé sur MtxServ (au cas ou ça puisse servir)
Et merci d'avance pour votre aide


EDIT 1 :

Le serveur est en 1.12.2
Il est en Bukkit.
Tous les plugins sont à jours et proviennent du site officiel de Bukkit.