The current CATS model has been trained on tensorflow 2.15.0, which uses Keras 2. While moving to tensorflow 2.19 (using Keras 3), we need to slightly modify the code (assuming the model is not yet retrained):

# to be put before importing tensorflow
import os
os.environ["TF_USE_LEGACY_KERAS"] = "1"

import tensorflow as tf

...

https://keras.io/getting_started/#tensorflow--keras-2-backwards-compatibility