This error '214021' is a weird error because this occurs due to no ink or faulty cartridge.
Now a regular person would label this as completely absurd, what scanning has got to do with Ink? Right! But Printers are created in a way that they depend on each other. So if one part is acting up, it would create problems for other activities going out through the printer/ scanner.
So please check the ink level and replace it if needed. Go to the manufacturer/Local dealer if it's still under warranty.