Hello everyone, I have a server (OMGSERV) and like any server I need the plugin "skript" but this plugin does not work! it sends me this error message on the console :

[11:12:14] [Server thread/INFO]: [Skript] Enabling Skript v2.1.2
[11:12:14] [Server thread/ERROR]: Error occurred while enabling Skript v2.1.2 (Is it up to date?)
java.lang.NoSuchMethodError: org.bukkit.DyeColor.getData()B
at ch.njol.skript.util.Color.<clinit>(Color.java:82) ~[?:?]
at ch.njol.skript.SkriptCommand.<clinit>(SkriptCommand.java:60) ~[?:?]
at ch.njol.skript.Skript.onEnable(Skript.java:254) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:403) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:381) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:330) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:422) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:383) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:338) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:272) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545) [spigot-1.12.2.jar:git-Spigot-4bd94dc-fb414fe]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]

And despite the help of many dev no has deciphered the problem! Can you help me ?

thank you in advance !