Azure Web App, streamlit stuck in `Please wait...` - azure

Question

I've created a web app service with B1 tier pricing in linux/python3.7
I've hooked up my Azure git to the deployement center, the application builds correctly, I've edited the start command to python -m streamlit run app.py --server.port 8000 --server.address 0.0.0.0. The app launches, I can access to the URL, but streamlit is stuck into Please wait...
I've tried to enable WebSockets, since some people said it was the issue. I could not found the option in the Portal, so I had to use the command az webapp config set --web-sockets-enabled true --name MyAppName --resource-group MyResourceGroup. In the output json, I can see the option enabled.
"webSocketsEnabled": true,
I tried to enable/disable all kind of options in the configuration Portal, but nothing is working. Any idea on what I am doing wrong?
(The app works in local mode, and I don't have access to Docker on my local computer, so I can not use this option to build my docker image)
EDIT 1:
In the chrome console, I get an error:
WebSocket connection to '' failed: WebSocket is closed before the connection is established.
But WebSocket is enabled, or at least from what my previous commands says

Answer 1

After reproducing from my end, I could able to reproduce the same error when the webapp is deployed with python 3.9.
RESULTS:
But when I re-deployed a new Web app with Runtime version- Python 3.10 the error was resolved. The below code works fine when the streamlit app runs locally.
import streamlit as st
st.set_page_config(page_title="My Test app", page_icon=":tada", layout="wide")
# --- HEADER SECTION ----
st.subheader("Hi, I am test app :wave:")
st.title("A test app to test streamlit")
st.write("I am passionate py developer")
st.write("[Learn More >](https://streamlit.io/)")
Python -m streamlit run app.py
RESULTS:
Deployed the same to a new app service on azure with Runtime stack Python version 3.10, OS Linux and SKU B1 Pricing tier (Basic).
Note- Free tier is not supported for Streamlit app atleast B1 or above is mandatory.
Deploy the local code of censusapp in Azure App Service via VS code.
After the code is deployed > Try accessing the website you will receive an application error, to resolve that. Let’s add python -m streamlit run app.py --server.port 8000 --server.address 0.0.0.0> in the startup command in the Configuration.
Disable HTTPS Only to OFF and set the configuration settings as below:-
NOTE: Even if you set this settings to OFF> you can browse your website with https://
After these settings are added and validated, follow the below steps
Browse your website
Wait until the website loads
Now you can see that the error doesn't show up anymore and the website runs successfully in the browser.
Make sure that if your Web app is running on lower Python version than 3.10 Please re-create a new Web App on Azure with runtime stack python 3.10 to resolve this issue.