I cannot connect to flask API no matter what method i try. I have a seperate jupyter notebook as a host to my flask app, i also have my NLP model backend in my jupyter notebook. everytime i try to test my given API on Postman it just wont connect, furthermore all the link given just wont connect with the message cant reach this page. ***.0.0.1000 wont connect. I really need this API to work so i can connect to my frontend android studio to my backend jupyter notebook

1. I tried THIS PARTICULAR CODING on different notebook:
   https://medium.com/@aspen.wilson/building-a-restful-api-with-flask-a-step-by-step-guide-3bfb092f98a1

2. I tried waitress serve to substitute flask

3. I tried gunicorn

4. I tried to clear my head by walking around but it just wont connect