This video shows how to reset the printer.
If you recently upgraded the printer firmware or just purchased some ink cartridges you may have 3rd party ink (just guessing).
New firmware may be checking the ink source.
To check if an HP ink cartridge is genuine, look for a security label on the cartridge, scan the QR code on the label with your phone, and then go to HP's website hp.com/go/ok to verify the serial number on the label; if the label appears tampered or the serial number doesn't validate, the cartridge is likely not genuine.