@Angelina067 Thank you so much for such a concrete suggestion. Sadly, I have tried everything you said but it’s still not working 
INFO:emotion-backend:Model loaded OK.
INFO: Started server process [1]
INFO: Waiting for application startup.
INFO: Application startup complete.
INFO: Uvicorn running on http://0.0.0.0:7860 (Press CTRL+C to quit)
And I am getting getting 404 HTML on POST