I've had the same issue. Happened with my MBPro and my Canon 9000F Mark II scanner all of a sudden, and I hadn't made any changes. I can scan from the utility, but can't scan from My Image Garden and can't save images after scanning from the scanning utility. Also couldn't add scanner back into the printers/systems and preferences. The scanner worked fine for a lomng time, then all of a sudden, didn't. never got it working again. Just got an new Macbook Air M1 2020 and same thing. Frustrating to no end. Yes I have the latest everything from Canon. Yes I have restarted, etc. Yes, I have done everything possible. This is on the Canon side.
