bug

[17:42:30 ERROR]: Could not load 'plugins/MobSpawnPlugin.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/aavild/MobSpawnPlugin/Main has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:134) ~[patched_1.13.2.jar:git-Paper-565]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:330) ~[patched_1.13.2.jar:git-Paper-565]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:252) ~[patched_1.13.2.jar:git-Paper-565]
at org.bukkit.craftbukkit.v1_13_R2.CraftServer.loadPlugins(CraftServer.java:331) ~[patched_1.13.2.jar:git-Paper-565]
at net.minecraft.server.v1_13_R2.DedicatedServer.init(DedicatedServer.java:235) ~[patched_1.13.2.jar:git-Paper-565]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:786) ~[patched_1.13.2.jar:git-Paper-565]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
Caused by: java.lang.UnsupportedClassVersionError: me/aavild/MobSpawnPlugin/Main has been compiled by a more recent version of the Java Runtime (class file version 55.0), 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_202]
at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[?:1.8.0_202]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_202]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:134) ~[patched_1.13.2.jar:git-Paper-565]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:84) ~[patched_1.13.2.jar:git-Paper-565]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_202]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_202]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_202]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_202]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:62) ~[patched_1.13.2.jar:git-Paper-565]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:130) ~[patched_1.13.2.jar:git-Paper-565]
... 6 more