Just installed Okular using the snap package in my ubuntu 16.04 machine. It works fine if right click a pdf and choose open with->okular. If I open Okular I cannot use the file menu in the toolbar. If click "Open.." nothing happens and have no error in dmesg, no error displayed. I am a newbie so please tell me if need you any further information, I will provide. Thank you. If can help I had Okular previously installed using apt (which if I remember well version 0.24), perfectly working, just wanted to try latest version (1.7.2) Any Idea?