This error message appears when I try to run the auto-generated script in the server folder

[20:32:36] [ERROR] [FabricLoader/]: Uncaught exception in thread "main" java.lang.RuntimeException: An exception occurred when launching the server! at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:68) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:66) Caused by: java.lang.RuntimeException: Error invoking MC server bundler: java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0 at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.processBundlerJar(MinecraftGameProvider.java:321) at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.locateGame(MinecraftGameProvider.java:206) at net.fabricmc.loader.impl.launch.knot.Knot.createGameProvider(Knot.java:172) at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:125) at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:71) at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) ... 5 more Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.lang.ClassLoader.defineClass(Unknown Source) at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider$1.loadClass(MinecraftGameProvider.java:277) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.processBundlerJar(MinecraftGameProvider.java:297) ... 10 more

This line in particular caught my eye and I think it has something to do with me using a newer version but i have no clue if I can even roll back to a newer Java version.

Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0

Minecraft 1.18 needs Java 17 to run. You used Java 8, so it won't work.

yep, installing it fixed the issues, thank you!