I cannot scan from the bundled application (Presto! BizCard or PageManager). (Macintosh)

Operation system return error

When I press "Scan" in my scanning software, an error message appears: "Please install scanner" or "The scan was aborted because the scanner is not powered on or not connected properly".

The cover of the manual document feeder is open.

Calibration failed. Please reboot the machine.

Driver busy