Comment 4 for bug 1843507

Konstantin Boyandin (7-det-g) wrote :

Confirming. If one tries rebooting the computer/VM, it may result in total failure, due to NetworkManager failing to start.

Temporary workaround as advised on the Net (works for Ubuntu 18.04.3, x86 64bit):

$ wget http://mirrors.kernel.org/ubuntu/pool/main/libi/libidn2/libidn2-0_2.0.4-1.1build2_amd64.deb
$ sudo dpkg -i libidn2-0_2.0.4-1.1build2_amd64.deb
$ sudo apt-mark hold libidn2-0