The Streamlit app stops with "Please wait... " and then stops - nginx

Question

Problem
The app started by running streamlit run main.py will display http://IP_ADDRESS:8501 is displayed correctly, but http://DOMAIN_NAME stops with "Please wait... " and stops.
Environment
Domain name already resolved with Route53
Deploy Streamlit App on EC2 (Amazon Linux) and run Streamlit run main.py on Tmux
Use Nginx to convert access to port80 to port8501
Changed Nginx settings
/etc/nginx/nginx.conf
server {
listen 80; #default
listen [::]:80; #default
server_name MY_DOMAIN_NAME;
location / {
proxy_pass http://MY_IP_ADDRESS:8501;
}
root /usr/share/nginx/html; #default
What I tried
I tried the following, but it did not solve the problem.
https://docs.streamlit.io/knowledge-base/deploy/remote-start#symptom-2-the-app-says-please-wait-forever
streamlit run my_app.py --server.enableCORS=false
streamlit run my_app.py --server.enableWebsocketCompression=false

Answer 1

Try the following conf:
server {
listen 80 default_server;
server_name MY_DOMAIN_NAME;
location / {
proxy_pass http://127.0.0.1:8501/;
proxy_http_version 1.1;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400;
}
and then, use this command line:
streamlit run my_app.py --server.port 8501 --server.baseUrlPath / --server.enableCORS false --server.enableXsrfProtection false

Answer 2

If anyone is using Ambassador as their ingress to kubernetes you'll need to allow websockets. This is explained at https://www.getambassador.io/docs/edge-stack/latest/howtos/websockets/
But, you essentially need to add the following to your Mapping
allow_upgrade:
- websocket

Answer 3

In my case, the fix was downgrading streamlit from v1.14.0 to v1.11.0.
What didn't work:
--server.headless=true
--server.enableCORS=false
--server.enableWebsocketCompression=false
How was the app deployed? GCS using Cloud Run

Answer 4

Try to upgrade Streamlit code to version 1.11.1.
Refer to this link: https://discuss.streamlit.io/t/security-notice-immediately-upgrade-your-streamlit-code-to-version-1-11-1/28399:
On July 27th, 2022, we learned of a potential vulnerability in the
Streamlit open source library that impacts apps that use custom
components. The vulnerability does not impact apps hosted on Streamlit
Cloud.
We released a patch on the same night, July 27th, 2022 at 2:20PM PST,
and ask that you immediately upgrade your Streamlit code to version
1.11.1 or higher. You can read more in this vulnerability advisory

Answer 5

--server.headless=true
I think the only problem is Streamlit trying to open a browser, so simply add this parameter in your run command:
streamlit run my_app.py --server.headless=true
or try to change this in the config file which is you need to create:
Refer to this explanation.

Answer 6

For me the answer was to load the app in incognito mode.