Solved by ngocuong0105 in post #2 
              
              
                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 b…