I recently installed Lubuntu 20.04 and being dissatisfied with the archive manager Ark I decided to replace it with file-roller. Everything is fine except the "Compress" action in the context menu (when you right-click one or more files) does not work (nothing at all happens).
Any idea how to fix this? And more generally, where are these context menu actions ("Compress", "Open in Terminal", ...) defined?
Thanks in advance