Hello. Im not that much of an expert. So Im not sure what kind of
information you need. But its Debian 8.7, amd64, Cinnamon, 16 GB ram
Or can you say what kind of information?
Today I freshly installed Debian 8.7.1 (latest stable), Gnome, amd64 using
VirtualBox with Windows 10 as the host, and then installed GPA on this
Debian. But it still has the same problem. Im boggled as to why I have this
Normally this error message can only come from gpgsm or dirmngr in case a certificate is listed that does have unsupported (unknown) critical extensions. Are you using X.509? What certificates do you have imported? You should be able to see the error and more information on the command line with "gpgsm -kv" and maybe some more options...