That is a general error, which may simply mean 'broken camera', I regret to have to say.
But: try removing the battery, then also removing the memory card or cards from the Canon camera.
Then, leave it that way for at least 1/2 hour or longer.
Put in just the battery, not the memory card you were using nor any other memory card - as a test. Turn it On at that point, with no memory card. Does it repeat the error? if it repeats the error, at least you have ruled out it being a defective memory card.
Please let me know a bit more also: how old the camera is, whether it has been well-taken-care-of and neither dropped nor gotten wet nor gotten damp, and has no been subjected to high temperatures (e.g. 90+ degrees F. for a prolonged period) nor cold (e.g. below about 40 degrees while operating, for a period longer than about 5 minutes at a time).
I will advise you further, as needed.