您应该可以看到日志中的错误，您可以使用这个英雄工具。

  heroku日志
 

I have created a mezzanine project and its name is mezzanine-heroku-test I create a Procfile that has the content as follow:

web: python manage.py run_gunicorn -b "0.0.0.0:$PORT" -w 3

Next, I access to the website to test and I receive the error: Internal Server Error. So, Could you please help me deploy mezzanine on heroku step by step or some suggestion?

Thank you so much.

You should be able to see the error in the logs which you can get to using the heroku tool.

heroku logs