I am using Lightroom 5.5 on mac.
I am trying to import 1 folder with many many subfolders. Lightroom added all the other subfolder fine, but refuses to import photos from a few subfolder - insisting that they are empty.
When I click on "synchronize folder", it correctly recognizes that there are 58 photos to be imported.
But then, it runs a while and tells me that:
Retrieving data ...