Çözüldü İtemsadder Kurulmuyor.

[12:15:50] [Server thread/INFO]: Using default channel type
[12:15:54] [Server thread/ERROR]: Could not load 'plugins\ItemsAdder_3.5.0c-r2.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: dev/lone/itemsadder/Main has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:149) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:394) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:301) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:381) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:224) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:928) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:273) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_391]
Caused by: java.lang.UnsupportedClassVersionError: dev/lone/itemsadder/Main has been compiled by a more recent version of the Java Runtime (class file version 53.0), 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:186) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_391]
        at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:104) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:99) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        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:67) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:145) ~[sv.jar:3096a-Spigot-9fb885e-af1a232]
        ... 7 more