Heroku App won't deploy

Anyone else seeing “App boot timeout” while deploying to Heroku the simplest image classifier as per Lesson 2? How to fix?

Here the full log of app start:

2022-03-04T15:10:40.116435+00:00 heroku[web.1]: State changed from crashed to starting

2022-03-04T15:10:40.003839+00:00 heroku[web.1]: Process exited with status 137

2022-03-04T15:11:02.288401+00:00 heroku[web.1]: Starting process with command `voila --port=6752 --no-browser --enable_nbextensions=True sea_animals_classifier.ipynb`

2022-03-04T15:11:04.858274+00:00 app[web.1]: [Voila] Using /tmp to store connection files

2022-03-04T15:11:04.858815+00:00 app[web.1]: [Voila] Storing connection files in /tmp/voila_wrt2_zru.

2022-03-04T15:11:04.858897+00:00 app[web.1]: [Voila] Serving static files from /app/.heroku/python/lib/python3.9/site-packages/voila/static.

2022-03-04T15:11:05.885070+00:00 app[web.1]: [Voila] Voilà is running at:

2022-03-04T15:11:05.885094+00:00 app[web.1]: http://localhost:6752/

2022-03-04T15:11:14.399101+00:00 heroku[router]: at=error code=H20 desc="App boot timeout" method=GET path="/" host=sea-animals-classifier.herokuapp.com request_id=9935e26c-2ed5-49b8-aa8c-04e6371f5236 fwd="194.110.114.251" dyno= connect= service= status=503 bytes= protocol=https

2022-03-04T15:10:42.000000+00:00 app[api]: Build succeeded

2022-03-04T15:12:02.813514+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch

2022-03-04T15:12:02.890911+00:00 heroku[web.1]: Stopping process with SIGKILL

2022-03-04T15:12:03.063776+00:00 heroku[web.1]: Process exited with status 137

2022-03-04T15:12:03.137872+00:00 heroku[web.1]: State changed from starting to crashed

2022-03-04T15:12:03.896351+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=sea-animals-classifier.herokuapp.com request_id=278043e3-64ec-44a4-9323-0da84c089825 fwd="194.110.114.251" dyno= connect= service= status=503 bytes= protocol=https

2022-03-04T15:12:06.253220+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=sea-animals-classifier.herokuapp.com request_id=b214b71c-20c7-47c9-9bd2-9a28eb7baaa0 fwd="194.110.114.251" dyno= connect= service= status=503 bytes= protocol=https