DIAGNOSIS The printer has not recognized the new cartridges. The chip on the cartridge is not making contact or the printer's memory needs a reset.
FIX Turn the printer on. Open the cartridge cover. Press and hold the Stop button for 5 seconds. The carriage will move. Remove and re-seat each cartridge firmly. You should feel a click. Close the cover. The printer will initialize the new cartridges.
IF THAT DIDN'T WORK You may have installed cartridges with expired or faulty chips. Only use Canon CLI-281 (color) and PG-280 (black) cartridges. Remove them and check the expiration date on the box. Try another set.
HEADS UP Using non-Canon or refilled cartridges can cause this error permanently. The printer may disable the printhead. This is not repairable at home.