I'm using the networkmanager-fortisslvpn client to connect to a Fortinet VPN and when not saving the password, the GUI asks me: "Authenticate VPN" "You need to authenticate to access the Virtual Private Network" "[Name of Connection]" for a password, but whether I click , "Cancel", "OK", or check or uncheck the checkbox "Show passwords" nothing happens. A workaround is to save the password, but that's something that I do not consider safe. Using XFCE 4.12 with nm-applet.
Recently this somehow started working (I think an upgrade of 1 of the packages related to the issue resolves the issue).