Hi, I'm Robert and I'll be helping you with your printer question.
that printer doesn't have a very good system for explaining the error.
If you have the full canon driver running on the computer that might give you a more descriptive message on what is wrong.
or if the light is flashing in a particular sequence like 3 flashes pause 3 flashes pause 3 flashes pause etc.
you can look up what that number of flashes means.
this chart is for a different canon printer but they are pretty consistent for all canons.