Why do I get a "port already in use" error?

This error means another application is already listening on the TCP port you selected. Only one process can bind to a given port at a time.

To resolve this:

• Choose a different port number
• Find and stop the application using that port. In a command prompt, run netstat -ano | findstr :PORTNUMBER to see which process ID is using it
• Use Task Manager to identify the process by its PID