Bug#967896:

Same issue on this laptop: ASUS Vivobook S S413FQ-EB029T This is a blocking issue as Debian Buster can't be installed without a RJ45-USB adapter. Tom LAREDO

Bug#874455: Related threads

Forgot to mention that I found some threads that seem to be related to this issue (same error message): - https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1656024 - https://github.com/lxc/lxc/issues/1423 Those threads discuss more about systemd and LXC than about varnish itself. Tom