This article explains what to do if you see the error "You do not have permission to open the application “Canon IJScanner###" when scanning after installing the ICA driver for your scanner or multifunction printer on macOS 11.5.
To print or scan wirelessly with the PIXMA TS series printer, you will start the Easy Wireless Connect process on your printer, then complete it on your computer or device. ... 1. Start Easy Wireless Connect on your printer. If an error screen displays, press OK