This message indicates that the all-in-one printer detects that the Paper Output Tray is closed when a print job is started.

To resolve, follow the on-screen instructions to open the tray, then press OK to continue.

If the Paper Output Tray is open, but the printer continues to display the error:

  1. Close the Paper Output Tray, then open it again.
  2. Press the OK button.

If the error continues:

  1. Press the On/Off button on the printer control panel to turn off your printer.
  2. Wait 30 seconds.
  3. Press the On/Off button again to turn on your printer.