Sorry to hear people are still experiencing this . Mine was replaced by Canon back when I opened this thread years ago and it has been working flawlessly ever since. Never got the error again. Best I can suggest is to contact Canon customer support or the store where you purchased the printer if it's still in warranty and hope they can replace yours as well.
Here is what worked for me (not a specialist, just a user)
Disconnect printer from the power outlet.
While keeping the red STOP button pressed, connect printer to the power outlet again (nice gymnastics!)
After some 20 s or so, the orange light will start to blink (every 2 or 3 s)
At that time unpress the red STOP button (the orange light will continue to blink at low frequency)
Press the ON button
The printer starts up again and shows a warning indicating that last time it was not properly stopped. Always power off the printer with the button, not by disconnecting the power cord. Glad it was forgiving this time.
My MG5650 printer got this problem today. Tried JosBly's method above. Pressed the red STOP button for several seconds and sure enough the orange light starts to slow-blink. However, pressing the ON button after this did not work. All that happened is that the orange light went back to solid
Does anyone at Canon have a proper solution to this issue?