Scanner Error -9923 with HP Deskjet 5258 printer OS Sierra
In System Preferences, under Printers and Scanners, when I select Scan and then Open Scanner, I get the message "An error occurred while communicating with the scanner -9923." Printer prints documents ok. I had the same problem with the HP Smart app installed - but Apple says this printer is supported under AirPrint, so the HP Smart app is sitting in the trash. I still am getting the -9923 error.
Thanks for your help.
MacBook, macOS 10.12