How is the message shown? On the command line?
Can you attach the file ~/.cache/simple-scan/simple-scan.log after this occurs? (Or run simple-scan -d from the command line)
Do you have any SANE drivers installed? You can see them in /usr/lib/sane
My guess at the problem is either you have something incorrectly installed or you have a SANE driver that has a mismatch with your installed version of libgusb.
How is the message shown? On the command line? simple- scan/simple- scan.log after this occurs? (Or run simple-scan -d from the command line)
Can you attach the file ~/.cache/
Do you have any SANE drivers installed? You can see them in /usr/lib/sane
My guess at the problem is either you have something incorrectly installed or you have a SANE driver that has a mismatch with your installed version of libgusb.