I've just done a clean architectury install but when I execute runClient, I eventually get this error:
[18:55:48] [main/ERROR] (FabricLoader) Uncaught exception in thread "main"
java.lang.RuntimeException: Mixin transformation of net.minecraft.client.main.Main failed
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427) ~[fabric-loader-0.14.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323) ~[fabric-loader-0.14.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218) ~[fabric-loader-0.14.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:112) ~[fabric-loader-0.14.11.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?]
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:455) ~[fabric-loader-0.14.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.14.11.jar:?]
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.14.11.jar:?]
at net.fabricmc.devlaunchinjector.Main.main(Main.java:86) ~[dev-launch-injector-0.2.1+build.8.jar:?]
at dev.architectury.transformer.TransformerRuntime.main(TransformerRuntime.java:219) ~[architectury-transformer-5.2.75-runtime.jar:?]
Caused by: java.lang.ExceptionInInitializerError
at net.fabricmc.loader.api.FabricLoader.getInstance(FabricLoader.java:41) ~[fabric-loader-0.14.19.jar:?]
at net.fabricmc.fabric.impl.client.indigo.IndigoMixinConfigPlugin.loadIfNeeded(IndigoMixinConfigPlugin.java:45) ~[fabric-renderer-indigo-0.8.0+3a95925a85.jar:?]
at net.fabricmc.fabric.impl.client.indigo.IndigoMixinConfigPlugin.shouldApplyIndigo(IndigoMixinConfigPlugin.java:60) ~[fabric-renderer-indigo-0.8.0+3a95925a85.jar:?]
at net.fabricmc.fabric.impl.client.indigo.IndigoMixinConfigPlugin.shouldApplyMixin(IndigoMixinConfigPlugin.java:79) ~[fabric-renderer-indigo-0.8.0+3a95925a85.jar:?]
at org.spongepowered.asm.mixin.transformer.PluginHandle.shouldApplyMixin(PluginHandle.java:132) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinInfo.shouldApplyMixin(MixinInfo.java:988) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinInfo.readDeclaredTargets(MixinInfo.java:953) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinInfo.(MixinInfo.java:882) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinConfig.prepareMixins(MixinConfig.java:852) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinConfig.prepare(MixinConfig.java:781) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:540) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:462) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:438) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:290) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422) ~[fabric-loader-0.14.11.jar:?]
... 9 more
Caused by: java.lang.IllegalStateException: trying to load net.fabricmc.loader.impl.FabricLoaderImpl from target class loader
at net.fabricmc.loader.impl.util.LoaderUtil.verifyNotInTargetCl(LoaderUtil.java:51) ~[fabric-loader-0.14.19.jar:?]
at net.fabricmc.loader.impl.FabricLoaderImpl.(FabricLoaderImpl.java:539) ~[fabric-loader-0.14.19.jar:?]
at net.fabricmc.loader.api.FabricLoader.getInstance(FabricLoader.java:41) ~[fabric-loader-0.14.19.jar:?]
at net.fabricmc.fabric.impl.client.indigo.IndigoMixinConfigPlugin.loadIfNeeded(IndigoMixinConfigPlugin.java:45) ~[fabric-renderer-indigo-0.8.0+3a95925a85.jar:?]
at net.fabricmc.fabric.impl.client.indigo.IndigoMixinConfigPlugin.shouldApplyIndigo(IndigoMixinConfigPlugin.java:60) ~[fabric-renderer-indigo-0.8.0+3a95925a85.jar:?]
at net.fabricmc.fabric.impl.client.indigo.IndigoMixinConfigPlugin.shouldApplyMixin(IndigoMixinConfigPlugin.java:79) ~[fabric-renderer-indigo-0.8.0+3a95925a85.jar:?]
at org.spongepowered.asm.mixin.transformer.PluginHandle.shouldApplyMixin(PluginHandle.java:132) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinInfo.shouldApplyMixin(MixinInfo.java:988) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinInfo.readDeclaredTargets(MixinInfo.java:953) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinInfo.(MixinInfo.java:882) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinConfig.prepareMixins(MixinConfig.java:852) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinConfig.prepare(MixinConfig.java:781) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:540) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:462) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:438) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:290) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202) ~[sponge-mixin-0.11.4+mixin.0.8.5.jar:0.11.4+mixin.0.8.5]
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422) ~[fabric-loader-0.14.11.jar:?]
... 9 more