Błąd podczas przeładowywania skryptu

tak jak w temacie oto logi z konsoli

[15:28:47 WARN]: Unexpected exception while parsing console command "sk reload all"
org.bukkit.command.CommandException: Unhandled exception executing command 'sk' in plugin Skript v2.1.2
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[mc.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[mc.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[mc.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627) [mc.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412) [mc.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [mc.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [mc.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [mc.jar:git-Spigot-db6de12-18fbb24]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]
Caused by: java.lang.NoSuchMethodError: ch.njol.util.NonNullPair.getSecond()Ljava/lang/Object;
        at ch.njol.skript.command.Commands.loadCommand(Commands.java:379) ~[?:?]
        at ch.njol.skript.ScriptLoader.loadScript(ScriptLoader.java:462) ~[?:?]
        at ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:239) ~[?:?]
        at ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:193) ~[?:?]
        at ch.njol.skript.Skript.reload(Skript.java:548) ~[?:?]
        at ch.njol.skript.SkriptCommand.onCommand(SkriptCommand.java:130) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[mc.jar:git-Spigot-db6de12-18fbb24]

przy komendzie reload to nie działa