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 java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        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 55.0
        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 55.0
        at java.base/java.lang.ClassLoader.defineClass1(Native Method)
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:877)
        at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider$1.loadClass(MinecraftGameProvider.java:277)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:398)
        at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.processBundlerJar(MinecraftGameProvider.java:297)
        ... 10 more

使用  java17 开服

你的Java不支持  使用17版本以上

您正在使用 Java 8。请使用 Java 16+ 开启此服务器。
下载：(源：微软官方)
https://learn.microsoft.com/zh-cn/java/openjdk/download

换Java17启动
java17 https://cowtransfer.com/s/8c5a70e571ab4e

https://aka.ms/download-jdk/micr ... 4.1-windows-x64.msi
上面的链接可以下载JAVA17