Could not load 'plugins\AntiCheat.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: de/stuporio/pvpgym/Main has been compiled by a more recent version of the Java Runtime (class file version 59.0), this version of the Java Runtime only recognizes class file versions up to 52.0 at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:139) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:394) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:301) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:383) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:185) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:808) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:164) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at java.lang.Thread.run(Unknown Source) [?:1.8.0_281] Caused by: java.lang.UnsupportedClassVersionError: de/stuporio/pvpgym/Main has been compiled by a more recent version of the Java Runtime (class file version 59.0), 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_281] at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_281] at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_281] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:163) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:96) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_281] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_281] at java.lang.Class.forName0(Native Method) ~[?:1.8.0_281] at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_281] at org.bukkit.plugin.java.PluginClassLoader.(PluginClassLoader.java:64) ~[spigot.jar:git-Spigot-37d799b-3eb7236] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot.jar:git-Spigot-37d799b-3eb7236] ... 7 more