Streamlit app is not opening on few client PC browser

In a same LAN environment streamlit app is not opening from few machine’s (Win 10) browser. There is no error thrown.
however it is opening on server machine’s (win 11) browser (localhost) and some other client PC (win 10) in the same Lan environment . Port 8501 is used .

Note: As part of troubleshooting I run a http server on same port (python -m http.server [port]) there is no problem in those affected PC ( Where streamlit app is not loading)
it means problem is at the streamlit .

experts please comment

Eureka. Got the solution