When fine-tuning a model with Tensorflow at the Fine-tuning a model with Keras page, at these steps:

We will get this error:

The solution is to set the TF_USE_LEGACY_KERAS environment variable to 1:

import os
os.environ['TF_USE_LEGACY_KERAS'] = '1'

We should inform this situation at every Tensorflow tutorial in the Hugging Face course.