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.
Master Setup (Full Driver & Software Packages) For some models, when setting up the printer via a USB cable, after the USB cable is connected, an error screen appears without the driver installed. [Workaround]
