Invoking calls with invalid/unhandled URI does not open the UI
$ ~/install/bin/calls https:waduawd
(sm.puri.Calls:141452): Gtk-CRITICAL **: 23:28:11.912: gtk_application_uninhibit: assertion 'GTK_IS_APPLICATION (application)' failed
** (sm.puri.Calls:141452): WARNING **: 23:28:11.915: Don't know how to open file `https:waduawd', ignoring
does not open the GUI