Thank you for your suggestions, Irwin6. I followed the steps but still getting the error message about missing cartridges. Did I need to close the cover after each time I removed the cartridge?
I am refilling the empty HP cartridge with ink I purchased (done successfully many times on my previous HP printer), so these are not generic ink cartridges.
I understand HP now marks them somehow so they can’t be refilled?
Any other suggestions, please? TY!