This issue can have several causes. There is no information regarding the number that is displayed on the printer screen. To try fixing the error, first you need to check if the printer is properly connected with the PC, if it's plugged in and if the driver is properly installed. These are the main reasons for printer problems. If you checked all the above and you still can't print, just unplug the Canon device and let it stay like this for a couple of minutes, then plug it back in and try again.
If you still experience problems, contact the manufacturer on the official website for further assistance.