Unable to export pictures from a catalog
Using LR5.7.1 on Windows 10.
See screenshot.
Why is the All Photographs total equal to the Missing Photographs total?
Why are there question marks next to the folders names?
Tried exporting with File->Export with Preset to DNG...did not work says "No rendered photo on disk".
Tried Export as Catalog (which took several hours) and the amount files at the destination is equal to the amount it should be, but no photos there, only thumbnails or very small files of type .lrprev.

The photos look fine from the LR app and they look to be all there quantity-wise and quality-wise.
Starting the LR app gives 3 choices, 1 'regular' catalog and 2 backups. The backup catalogs experience the same issue.
