this is the crash

Minecraft has crashed!
net.fabricmc.loader.impl.FormattedException: java.lang.ExceptionInInitializerError
at Not Enough Crashes deobfuscated stack trace.(1.19.2+build.28)
at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:464)
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: java.lang.ExceptionInInitializerError
at net.minecraft.class_3523.(class_3523.java:13)
at net.minecraft.class_5471.(class_5471.java:11)
at net.minecraft.util.registry.BuiltinRegistries.method_30573(BuiltinRegistries:44)
at net.minecraft.util.registry.BuiltinRegistries.method_30566(BuiltinRegistries:75)
at java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
at net.minecraft.util.registry.BuiltinRegistries.(BuiltinRegistries:74)
at net.minecraft.util.registry.Registry.(Registry:266)
at net.minecraft.Bootstrap.initialize(Bootstrap:44)
at net.minecraft.client.main.Main.main(Main:139)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462)
... 2 more
Caused by: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_1542 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.lang.ClassLoader.loadClass(ClassLoader.java:520)
at net.minecraft.block.Blocks.(Blocks:103)
... 12 more
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 net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422)
... 17 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinPreProcessorException: Attach error for shulkerloader.mixins.json:ShulkerLoad from mod shulkerloader during activity: [Transform -> Method itemPickupEvent(Lnet/minecraft/class_1657;Lorg/spongepowered/asm/mixin/injection/callback/CallbackInfo;)V -> INVOKEVIRTUAL -> net/minecraft/class_6880$class_6883::method_40237:()Lnet/minecraft/class_5321;]
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:313)
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:277)
at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1289)
at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:294)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:421)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:403)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
... 20 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: net.minecraft.class_6880$class_6883
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transformMemberReference(MixinPreProcessorStandard.java:786)
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transformMethod(MixinPreProcessorStandard.java:772)
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transform(MixinPreProcessorStandard.java:738)
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:307)
... 26 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.class_6880$class_6883
... 30 more

Currently investigating. In the meantime, Version 1.0.3 appears to work fine, HOWEVER, it doesn't support modded items, so if you pick up modded items with a shulker box in your hand, they will disappear.

Fixed in Version 1.0.8