It seems that tqdm is incompatble with the new release of ipywidgets v8.0: with that version, the progress bar is rendered as JSON.

How to reproduce

Using Python 3.8.13:

python3 -m pip install ipywidgets==8.0.1 jupyterlab==3.4.5 tqdm==4.64.0

Then run the following in a Jupyter notebook:

import time
from tqdm.auto import tqdm

for i in tqdm(range(3)):
    time.sleep(1)

ipywidgets==7.7.2	ipywidgets==8.0.1