1.19.3 apparently breaks a lot of things, including this one

Crash message:
The game crashed whilst initializing game
Error: java.lang.BootstrapMethodError: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_757 failed

Game log (I left this on from before the mod):
Mixin apply for mod shaderreload failed shaderreload.mixins.json:GameRendererMixin from mod shaderreload -> net.minecraft.class_757: org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException Critical injection failure: @Redirect annotation on onLoadShaders$new could not find any targets matching 'Lnet/minecraft/class_757;method_34538(Lnet/minecraft/class_3300;)V' in net.minecraft.class_757. Using refmap shader-reload-refmap.json [PREINJECT Applicator Phase -> shaderreload.mixins.json:GameRendererMixin from mod shaderreload -> Prepare Injections -> -> redirect$zzo000$onLoadShaders$new(Lnet/minecraft/class_5912;Ljava/lang/String;Lnet/minecraft/class_293;)Lnet/minecraft/class_5944; -> Parse] org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException: Critical injection failure: @Redirect annotation on onLoadShaders$new could not find any targets matching 'Lnet/minecraft/class_757;method_34538(Lnet/minecraft/class_3300;)V' in net.minecraft.class_757. Using refmap shader-reload-refmap.json [PREINJECT Applicator Phase -> shaderreload.mixins.json:GameRendererMixin from mod shaderreload -> Prepare Injections -> -> redirect$zzo000$onLoadShaders$new(Lnet/minecraft/class_5912;Ljava/lang/String;Lnet/minecraft/class_293;)Lnet/minecraft/class_5944; -> Parse]

Hopefully this might somewhat help if you weren't working on it? =]

It worked on 1.19.1 and 2