Same problem, on a MF733cdw (which worked fine recently). I went to https://www.usa.canon.com/support and downloaded all the drivers and utilities for my model. That fixed the problem.
Google Cloud Print suddenly stopped working on my MF733cdw. Here's what fixed it: Log in to the web UI as adminGo to Settings/Registration/Preferences/Network Settings/TLS SettingsClick "Key and Certificate" under Key and Certificate SettingsClick "R...
