Hello, I was using the 1.19.2 and 1.19.3 core build from the actions.
Thanks already - loving the mod 😊

java.lang.RuntimeException: Mixin transformation of net.minecraft.class_761 failed
at Not Enough Crashes deobfuscated stack trace.(1.19.3+build.4)
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.lang.ClassLoader.loadClass(ClassLoader.java:520)
at net.minecraft.client.MinecraftClient.(MinecraftClient:586)
at net.minecraft.client.main.Main.main(Main:205)
at net.minecraft.client.main.Main.main(Main:51)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:461)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202)
at io.gitlab.jfronny.libjf.unsafe.asm.AsmTransformer.transformClassBytes(AsmTransformer.java:77)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422)
... 10 more
Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [betterblockoutline.mixins.json:WorldRendererMixin from mod betterblockoutline] from phase [DEFAULT] in config [betterblockoutline.mixins.json] FAILED during APPLY
at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:638)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinApplyError(MixinProcessor.java:589)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:379)
... 14 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: Unexpecteded ClassMetadataNotFoundException whilst transforming the mixin class: [MAIN Applicator Phase -> betterblockoutline.mixins.json:WorldRendererMixin from mod betterblockoutline -> Apply Methods -> (Lnet/minecraft/class_4587;FJZLnet/minecraft/class_4184;Lnet/minecraft/class_757;Lnet/minecraft/class_765;Lnet/minecraft/class_1159;Lorg/spongepowered/asm/mixin/injection/callback/CallbackInfo;)V:handler$zkm000$render -> Transform LVT -> var=positionMatrix -> desc=Lnet/minecraft/class_1159;]
at Not Enough Crashes deobfuscated stack trace.(1.19.3+build.4)
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformMethod(MixinTargetContext.java:510)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyNormalMethod(MixinApplicatorStandard.java:533)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMethods(MixinApplicatorStandard.java:519)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:386)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:325)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:421)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:403)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
... 14 more
Caused by: org.spongepowered.asm.mixin.throwables.ClassMetadataNotFoundException: net.minecraft.class_1159
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformSingleDescriptor(MixinTargetContext.java:1002)
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformSingleDescriptor(MixinTargetContext.java:962)
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformLVT(MixinTargetContext.java:563)
at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformMethod(MixinTargetContext.java:469)
... 21 more

Thank you 😊