Deploy with Flask always fails

I’ve been dwelling with it for two days now. It seems impossible to deploy a Flask application on this thing. I even managed to use gunicorn, but it still shows the deploy failed when the app finishes to load.

I need to perform some training forehand, with Tensorflow so that’s the command I use to run the application:

gunicorn --preload app:app

those are the final lines of my log:

| Adam | epoch: 350 | loss: 0.01830 - acc: 1.0000 -- iter: 85/85
May 4 11:50:40 PM  --
May 4 11:50:40 PM   * Tip: There are .env or .flaskenv files present. Do "pip install python-dotenv" to use them.
May 4 11:50:40 PM   * Serving Flask app 'chatbot_api.server.instance' (lazy loading)
May 4 11:50:40 PM   * Environment: production
May 4 11:50:40 PM     WARNING: This is a development server. Do not use it in a production deployment.
May 4 11:50:40 PM     Use a production WSGI server instead.
May 4 11:50:40 PM   * Debug mode: on
May 4 11:50:40 PM   * Running on (Press CTRL+C to quit)

On my machine this means application up and running, but just a few seconds I see this it shows the deploy has failed.

I sincerely don’t know what to do and I’m starting to think that choosing this platform could’ve been a mistake.


The issue here is likely:

Running on

Make sure your code binds to not


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