Cannot open deployed apps

Hi people!

I have been reading the docs for deployment in streamlit (Deploy an app β€” Streamlit 0.88.0 documentation) and saw that after deploying an app I can access it using a link

https://share.streamlit.io/[user name]/[repo name]/[branch name]/[app path]

In particular they give the example:
https://share.streamlit.io/streamlit/demo-self-driving

However when I open this link I get:

Same happens when I open my app:
https://share.streamlit.io/ngocuong0105/stock_webapp/saigon.py
with git repo:

Anybody knows what’s going on?
Thanks!

Consider the post solved, I found the issue myself.

When I was deploying my app and it was in the oven the manager gave an error:

[manager] Error checking Streamlit healthz: Get "http://localhost:8501/healthz": dial tcp 127.0.0.1:8501: connect: connection refused

This was already resolved here by changing the config.toml file: