Station API Fails to Launch with Vanilla Launcher

[Jadestrouble]

When Creating an instance of Babric 0.14.19 on Beta 1.7.3 with Oracle's Java 17 JDK, And "Station API 88236ff" on Windows 11, Minecraft crashes with this error.

net.fabricmc.loader.impl.FormattedException: java.lang.RuntimeException: Could not execute entrypoint stage 'preLaunch' due to errors, provided by 'station-api-base'!
	at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63)
	at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:164)
	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.RuntimeException: Could not execute entrypoint stage 'preLaunch' due to errors, provided by 'station-api-base'!
	at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.lambda$invoke0$0(EntrypointUtils.java:51)
	at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
	at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:49)
	at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke(EntrypointUtils.java:35)
	at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:162)
	... 2 more
Caused by: net.fabricmc.loader.api.EntrypointException: Exception while loading entries for entrypoint 'preLaunch' provided by 'station-api-base'
	at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:56)
	at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:47)
	... 4 more
Caused by: java.lang.RuntimeException: Mixin transformation of net.modificationstation.stationapi.api.StationAPI failed
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427)
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323)
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
	at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:112)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:467)
	at net.fabricmc.loader.impl.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50)
	at net.fabricmc.loader.impl.entrypoint.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:117)
	at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53)
	... 5 more
Caused by: java.lang.LinkageError: loader constraint violation: loader net.fabricmc.loader.impl.launch.knot.KnotClassLoader @48eff760 wants to load class org.objectweb.asm.tree.ClassNode. A different class with the same name was previously loaded by 'app'. (org.objectweb.asm.tree.ClassNode is in unnamed module of loader 'app')
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
	at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.defineClassFwd(KnotClassLoader.java:153)
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:355)
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
	at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:112)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
	at com.llamalad7.mixinextras.utils.MixinInternals.<clinit>(MixinInternals.java:43)
	at com.llamalad7.mixinextras.service.MixinExtrasServiceImpl.lambda$takeControlFrom$0(MixinExtrasServiceImpl.java:59)
	at java.base/java.util.Arrays$ArrayList.forEach(Arrays.java:4204)
	at com.llamalad7.mixinextras.service.MixinExtrasServiceImpl.takeControlFrom(MixinExtrasServiceImpl.java:54)
	at com.llamalad7.mixinextras.service.MixinExtrasService.setup(MixinExtrasService.java:30)
	at com.llamalad7.mixinextras.MixinExtrasBootstrap.initialize(MixinExtrasBootstrap.java:40)
	at com.llamalad7.mixinextras.MixinExtrasBootstrap.init(MixinExtrasBootstrap.java:22)
	at com.llamalad7.mixinextras.platform.fabric.MixinExtrasConfigPlugin.onLoad(MixinExtrasConfigPlugin.java:14)
	at org.spongepowered.asm.mixin.transformer.PluginHandle.onLoad(PluginHandle.java:119)
	at org.spongepowered.asm.mixin.transformer.MixinConfig.onSelect(MixinConfig.java:709)
	at org.spongepowered.asm.mixin.transformer.MixinProcessor.selectConfigs(MixinProcessor.java:498)
	at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:460)
	at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:438)
	at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:290)
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234)
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202)
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422)
	... 14 more

[MrMasrozYTLIVE]

Babric does modify few things and adds its libraries (Like modified LWJGL) so I think its just pointless to run it in vanilla launcher. It should be possible tho if you'll modify version JSON tho

[Lassebq]

That sounds like a problem with multiple asm libraries on path, and I think I know a solution

[matthewperiut]

I ran it in the vanilla launcher recently, so I'm not sure why you're experiencing an issue, but I did do it on linux with temurin-17 instead of embedded java in mc launcher