Uncaught exception in thread "main"
java.lang.NoClassDefFoundError: net/fabricmc/tinyremapper/TinyRemapper
        at net.fabricmc.loader.impl.game.LoaderLibrary.<clinit>(LoaderLibrary.java:42)
        at net.fabricmc.loader.impl.game.LibClassifier.<init>(LibClassifier.java:100)
        at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.locateGame(MinecraftGameProvider.java:171)
        at net.fabricmc.loader.impl.launch.knot.Knot.createGameProvider(Knot.java:177)
        at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:130)
        at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
        at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: java.lang.ClassNotFoundException: net.fabricmc.tinyremapper.TinyRemapper
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
        ... 7 more
以上就是报错信息，用的是java17

看上去是依赖没到位？换个启动器重新下一份试试？
编辑：不对啊，纯净端哪来的fabric loader
你再确认下？