Software categories doesn't work in RC 2.6

I'm trying Ocs RC 2.6, and I'm following the official instructions given here: https://wiki.ocsinventory-ng.org/04.Management-console-and-its-advanced-features/Using-Software-Categorization/

but nothing is shown:

http://prntscr.com/m2ckza

Has somebody tried that feature? Did it work for you? Thank you