I hit this upon manually installing Xfce4 after a fresh Ubuntu 20.04 installation. And even though Thunar has a Recommends for policykit-1-gnome, it nonetheless was not installed when Thunar was installed for some reason, and I had to install it manually anyway.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1821364 Title: xfce4 install on Ubuntu 18.04 has no polkit agent To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4/+bug/1821364/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs