|You "may" need to (re-)install the drivers afresh.. I have had similar problems in the past with a Canon inkjet and a re-install from scratch resolved them.|
Remember that Canon insist on their order or procedure; usb setup first then networking... Also their current range will not allow both wifi and cat-5/ethernet connection to work at the same time. You are "obliged" to enable only or other mode of network connection at a time.
My elderly Canon inkjet will allow both modes at the same time - with some versions of windows and some version of Mac OS; but not all... Don't ask me why.. Never managed to figure it out.
Incidentally can you ping the printer (its network ip address)?