Switch the Canon mg3620 Setup Printer on by pressing the power button forcefully.
Link your machine and printer to the same network.
Restart your printer and machine with the Canon.
Uninstall the printer driver app.
Reinstall the new version of the full featured app for the printer engine.
Perform a scan feature and verify whether the issue is resolved.
If the issue of the scanner not working continues, get in contact with our technicians.