Unable to verify the printer on your network
My Canon MX922, recently stopped printing (around the same time as the 11.3 update) with the error message See attached screen shot)
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Hi,
Based on the picture, I assume that you wish to use the MX922 as a networked (AirPrint) printer connected to a Wi-Fi router. To begin with, try the following: Power off the router, the printer, the computer, and all other devices/computers. Wait two to three minutes. Power on the router. Wait another two to three minutes. Power on the printer. Wait a minute or two. Power on the computer. Finally, power on all other devices/computers. Any difference?
If not, try resetting the printing system and re-adding the printer (as an AirPrint printer).
Reset the Mac printing system to solve a problem - Apple Support
Add a printer on Mac - Apple Support
The MX922 is, as you already know, a model supporting the driverless AirPrint technology.
About AirPrint - Apple Support
A guide from Canon Europe (with similar PIXMA models) may also be of interest.
https://www.canon-europe.com/support/consumer_products/apple_airprint_guide/