Yes I solved this issue via the solution here: https://www.raspberrypi.org/forums/viewtopic.php?t=209475 In general I discovered the source of the problem, looking at the raspi.list I realised that it only contained: deb http://archive.raspberrypi.org/debian/ stretch main ui deb-src http://archive.r...

I'm trying to install the dirmngr package but I'm getting the following error: pi@RevPi12146:~ $ sudo apt-get install dirmngr Reading package lists... Done Building dependency tree Reading state information... Done Package dirmngr is not available, but is referred to by another package. This may mea...