Check the following points to resolve the issue:

You installed a new ink cartridge too quickly and the machine did not detect it.

Take out the new ink cartridge and reinstall it slowly and firmly until it latches.
> Click here to see how to replace the Ink Cartridge.

An ink cartridge is not installed correctly.

Take out the new ink cartridge and reinstall it slowly and firmly until it latches.
> Click here to see how to replace the Ink Cartridge.

The new ink cartridge has an air bubble.

Slowly turn the ink cartridge so that the ink supply port is pointing downward, and then reinstall the cartridge.

The ink cartridge model number is not compatible with your machine.

Verify the cartridge model number will work with your machine.
Visit the Consumables & Accessories section on this web site to know what consumables are available for your machine and its ink cartridge model numbers.
> Click here to see the Consumables & Accessories section.

 A used ink cartridge was reinstalled.

 Remove the used ink cartridge and install a new one.

The ink cartridge must be replaced.

Replace the cartridge with a new Genuine Brother Ink Cartridge.

If you are not using Genuine Brother ink, the machine may not detect the ink cartridge.

Use a new Genuine Brother Ink Cartridge. If the error message is not cleared, contact Brother Customer Service from the "Contact Us" section.