UE4 Editor crashes on load with "Path does not map to any roots" (MacOS 10.15.7, UE4.23.1, FMOD 2.01.05 for UE4.23 Mac plugin)

Ok, I managed to track down the error. For some reason on the branch I was testing on my Mac, the following line had been added to DefaultEngine.ini:

ContentBrowserPrefix=/FMOD/ 

This may have been the result of trying to fix other issues we had integrating FMOD into the project but (touch wood!) it seems to be working on both Mac & PC now!