Forge 47.2.32
sihywtcamd-1.10.1+1.20.1.jar
Connector-1.0.0-beta.43+1.20.1.jar
fabric-api-0.92.1+1.11.8+1.20.1.jar

The mod worked from version 1.8 but not 1.9.1 and above

Crash Log:
Not Generated during launch due to early crash

Console Log:
latest.log

This message popped up across versions 1.9.1 to 1.10.1:
Caused by: org.spongepowered.asm.mixin.injection.throwables.InjectionError: Critical injection failure: Callback method updateZombieType(Lnet/minecraft/world/level/Level;Lcom/llamalad7/mixinextras/injector/wrapoperation/Operation;)Lnet/minecraft/world/entity/monster/Zombie; in sihywtcamd.mixins.json:zombie.ZombieLivingMixin from mod sihywtcamd failed injection check, (0/1) succeeded. Scanned 1 target(s). Using refmap sihywtcamd-refmap.json

Hi, I don't have time to check your issue at the moment, but as soon as I can, I will try to reproduce and understand your issue. However, I understand that Sinytra Connector is in beta and you should expect this kind of issue with Fabric mods.
When I have more information about it, I will update you. But this issue is likely to be more appropriate in the Sinytra Connector repo.

Alright, I'll also report this issue to them. Thanks for clarifying