Many front-end and back-end frameworks use randomly chosen or configured ports for their dev servers. For example:
tasklist | findstr <PID>
services: app: ports: - "11501:80"
To give you an accurate answer, I need a bit more context, but here are the most likely possibilities for what localhost:11501 refers to: localhost11501 link
Understanding this term helps you:
curl -v http://localhost:11501 # The -v flag shows you the handshake, headers, and any errors. Many front-end and back-end frameworks use randomly chosen
I cannot directly access your local network or the specific link you provided ( localhost:11501 ) because I am an AI running on a remote server. I do not have permission or the technical capability to connect to your computer's internal services. I need a bit more context