Since this worked for me with subiquity 20.06.1 https://github.com/CanonicalLtd/subiquity/releases/tag/20.06.1 and 20.06.1 got released and can be used either by updating the subiquity installer to the latest level or by using a current daily live-server image (http://cdimage.ubuntu.com/ubuntu-server/daily-live/current/) I'm adjusting the project entry of this ticket to Fix Released.
** Changed in: ubuntu-z-systems Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879286 Title: [UBUNTU 20.04] Netplan configuration fails to apply in subiquity installer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1879286/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs