Code: [12:27:02 ERROR]: Could not load 'plugins\lpermissions.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/lucas/lpermissions/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:135) ~[spigot.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigot.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [spigot.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:292) [spigot.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:198) [spigot.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot.jar:git-Spigot-db6de12-18fbb24] at java.lang.Thread.run(Unknown Source) [?:1.8.0_281] Caused by: java.lang.UnsupportedClassVersionError: me/lucas/lpermissions/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 java.net.URLClassLoader.defineClass(Unknown Source) ~[?:1.8.0_281] at java.net.URLClassLoader.access$100(Unknown Source) ~[?:1.8.0_281] at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_281] at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_281] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_281] at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_281] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[spigot.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot.jar:git-Spigot-db6de12-18fbb24] 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.<init>(PluginClassLoader.java:64) ~[spigot.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[spigot.jar:git-Spigot-db6de12-18fbb24] ... 6 more
Your plugin was compiled with Java 15 and you are running Java 8. Update your Java or compile the plugin with Java 8.
If you're going to make plugins, you really need to learn to read a stack trace. It tells you right there: Caused by: java.lang.UnsupportedClassVersionError: me/lucas/lpermissions/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
