If you have removed ubuntu-desktop, your system is a custom install, and unfortunately, you need to install libu2f-udev yourself....
Have you tried installing ubuntu-desktop _without recommends_ ? it should be a very minimal install, without any additional installs in bionic onwords.
If you have removed ubuntu-desktop, your system is a custom install, and unfortunately, you need to install libu2f-udev yourself....
Have you tried installing ubuntu-desktop _without recommends_ ? it should be a very minimal install, without any additional installs in bionic onwords.
$ sudo apt install ubuntu-desktop --no-install- recommends