I have installed Okular using
snap in my Ubuntu 14.04. It is functional but there seems to be a problem with some of the icons. They are not being displayed. I have run okular from terminal by:
snap run okular
and it displays these error messages:
Qt: Session management error: None of the authentication protocols specified are supported Icon theme "Adwaita" not found.
From a little search that I have conducted, these icons are from the Adwaita theme and can be installed from the package
adwaita-icon-theme-full. However, none of them are available for Trusty (at least on the standard repositories).
Any ideas on how to fix this problem?