Upgrade to High Sierra installed version of Fuse too old for OS

If you are not aware of any app needing FUSE you can remove it. You should see an icon in System Preferences for FUSE. You can remove or update from there:

FUSE System Preferences

See also: FUSE for macOS website


Going to the FUSE for macOS website, downloading and installing the latest version of FUSE from here solved he problem. Less hassle than trying to find the App using the outdated version. Although when it installs it doesn't select the reverse compatability tool, its worth doing so.