Experiencing same issue with architectury + forge 48.0.30
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/base/Preconditions
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.offer(MixinTransformationHandler.java:67)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.service.modlauncher.MixinServiceModLauncher.offer(MixinServiceModLauncher.java:162)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinBootstrap.offerInternals(MixinBootstrap.java:227)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinBootstrap.start(MixinBootstrap.java:148)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinTransformationServiceAbstract.initialize(MixinTransformationServiceAbstract.java:88)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.TransformationServiceDecorator.onInitialize(TransformationServiceDecorator.java:68)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.TransformationServicesHandler.lambda$initialiseTransformationServices$7(TransformationServicesHandler.java:92)
at java.base/java.util.HashMap$Values.forEach(HashMap.java:1065)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.TransformationServicesHandler.initialiseTransformationServices(TransformationServicesHandler.java:92)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:51)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:88)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:78)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
at MC-BOOTSTRAP/
[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141)
at net.fabricmc.devlaunchinjector.Main.main(Main.java:86)
at dev.architectury.transformer.TransformerRuntime.main(TransformerRuntime.java:219)
Caused by: java.lang.ClassNotFoundException: com.google.common.base.Preconditions
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:137)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
... 17 more