Has anyone had the same problem?
When installing from current server iso's in a VMWare VM and without a DHCP Server present, both Ubuntu installers are not able to manualy configure a ethernet interface.
With the ubuntu-18.04.2-server-amd64.iso the manual network configuration dialog stops after entering the hostname. and you end up with an unconfigured 01-netcfg.yaml
With the ubuntu-18.04.02-live-server-amd64.iso, the setup simply restarts after trying to save the manual IP configuration.
Did canonical forget to implement the netplan part of the setup? ;-)