1.12.2 버전에서 2.6.4 스크립트고  skrayfall skellet skquery skutilities 쓰고 있습니다.

서버 여는데 이런 오류가 뜨고 

[20:41:49 ERROR]: Could not load 'plugins\skRayFall+v1.9.27.jar' in folder 'plugins'

org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: net/rayfall/eyesniper2/skrayfall/Core has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0

        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[patched_1.12.2.jar:git-Paper-1620]

        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[patched_1.12.2.jar:git-Paper-1620]

        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) ~[patched_1.12.2.jar:git-Paper-1620]

        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:318) ~[patched_1.12.2.jar:git-Paper-1620]

        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:222) ~[patched_1.12.2.jar:git-Paper-1620]

        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:616) ~[patched_1.12.2.jar:git-Paper-1620]

        at java.lang.Thread.run(Unknown Source) [?:1.8.0_391]

Caused by: java.lang.UnsupportedClassVersionError: net/rayfall/eyesniper2/skrayfall/Core has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0

        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_391]

        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_391]

        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_391]

        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:152) ~[patched_1.12.2.jar:git-Paper-1620]

        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:104) ~[patched_1.12.2.jar:git-Paper-1620]

        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_391]

        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_391]

        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_391]

        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_391]

        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:82) ~[patched_1.12.2.jar:git-Paper-1620]

        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[patched_1.12.2.jar:git-Paper-1620]

        ... 6 more

거기다가 이 코드는 로딩은 오류없이 되는데 메뉴가 안열리네요... 연관이 있거나 무슨 문제가 있나요?

command /메뉴:

    trigger:

        set {_gui} to chest with 3 rows named "메뉴"

        loop 9 times:

            set slot loop-num -1 of {_gui} to black stained glass pain named "dddd" with lore "d"

        set slot 12 of {_gui} to diamond named "&a&l스폰으로 이동하기" with lore "&6&o클릭하면 스폰으로 이동합니다" and ""

on inventory click:

    if inventory name is "메뉴":

        cancel event

        if clicked slot is 12:

            execute op command "/tp 0 4 0"