Lightroom doesn't answer (and then turns off) when I try to synchronize folder.
I press "synchronize folder" button (there is 1 photo to add), tick also "show import dialog" then I press start. Import dialog is opening, it thinks for a few seconds, and then just doesn't answer.
How to solve it?
If I make a new catalog and import there some (NOT ALL) photos from that (problem) catalog (via IMPORT FROM CATALOG), the problem goes away. If I import ALL photos the problem remais the same.
Please update Lightroom to CC 2015.10.1 version and check if that helps also, can you please share the screenshot of the problem.