The cartridge isn’t installed properly, please re-install it
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The possible reason is that the inkjet cartridge was replaced while the power is off. Please re-install the previous cartridge if possible and turn the printer on. After the printer has initialised, replace the cartridge again; you may need to run the “Nozzle cleaning procedure” to restore print quality
The electrical contacts in the printer or on the cartridge may be dirty or suffering from oxidation and need cleaning or replacing.
Most inkjet cartridges have an installation foil or breather seal that is punctured on installation or has to be removed before installation. Please consult the printer user manual for installation details for the printer you have
If a cartridge was not installed according to the user manual it become corrupted and not regocnised by the printer. In such cases a replacemnet cartridge will be needed
If it still doesn’t work, switch the printer and the computer off for at least 10 minutes and retry. It may also be necessary to remove and re-install the printer driver