According to: https://wiki.trinitydesktop.org/Preliminary_Stable_Builds
I should do : apt-key adv --keyserver keys.gnupg.net --recv-key A04BE668
In order to get the Debian Stretch version installed.
But the message I get when trying this is:
Executing: /tmp/apt-key-gpghome.NclvApGG4K/gpg.1.sh --keyserver keys.gnupg.net --recv-key A04BE668 gpg: keyserver receive failed: No keyserver available
Any suggestions?
cheers
anthony