As suggested in post #15, I just filled a bug report on GitLab: <https://gitlab.gnome.org/GNOME/seahorse/issues/232>, however, as I have my doubts if it is really an upstream bug, as it didn't occur on Ubuntu 16.04, just on Ubuntu 18.04, and some users reported that in Debian it works.
Hope anyone will be able (and willing) to fix it. ** Bug watch added: gitlab.gnome.org/GNOME/seahorse/issues #232 https://gitlab.gnome.org/GNOME/seahorse/issues/232 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1771880 Title: Seahorse unable to import pkcs12 certificates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/1771880/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs