System
Minecraft 1.19.3
Fabric Launcher 1.14.14
Fabric API 0.75.1
Caracal 2.1.0
GeckoLib 4.0.4

Bug: Crash to desktop when rendering caracals in world
Error:
The game crashed whilst rendering entity in world
Error: java.lang.AbstractMethodError: Receiver class com.aqupd.caracal.entity.CaracalEntity does not define or inherit an implementation of the resolved method 'abstract void registerControllers(software.bernie.geckolib.core.animation.AnimatableManager$ControllerRegistrar)' of interface software.bernie.geckolib.core.animatable.GeoAnimatable.

Replication: Simply spawn a caracal with a spawn egg.
Expected behavior: Caracal should appear and crash my brain with its floppa adorableness.

revert back to GeckoLib 4.0.0 they removed software.bernie.geckolib.core.animation.AnimationEvent

Yea it's probably something with new versions of geckolib. Gonna fix it in a moment, thanks for reporting!

Fixed in 2.1.1!