Fujitsu has adapted the ScanSnap Home software for macOS Mojave.
Now supported scanner models are ScanSnap iX1500, iX500, iX100, S1300i, S1100i and SV600. View and download the updated software here.
If you are using an older scanner from the ScanSnap series (or from another manufacturer) that no longer runs under macOS 10.14 Mojave, we would like to point out an alternative here. Not free of charge, but trouble due to missing drivers is usually even more expensive.