The IP address of the computer that submits the profile is provided to the printer. The submitting computer then opens a network port and listens for incoming connections from the printer. The computer starts with network port tcp:9751 and progresses to tcp:9752 and so on until it finds an open port. When the printer starts scanning, it tries to open a network connection back to the submitting computer. If the submitting computer has a firewall enabled, it cannot establish a connection, so it cancels the scan job.
You can either disable your firewall or open the required scanning ports. If you are running only a few scans at a time, you can open just a few ports such as tcp:9751–tcp:9760.
To determine how to disable or enable your firewall, see the documentation that came with your operating system.