Hey @marciorpcoelho - this seems like an Apache configuration error, and I’m not sure any of us here have enough direct Apache experience to be very useful for debugging it further  , apologies.
Have you tried asking the Apache experts at StackOverflow 8?
Streamlit’s web server is not terribly exotic (it serves both HTTP and Websocket traffic over :8501, by default), so I would assume someone more well-versed in Apache than we are would be able to offer more assistance!