error: unable to contact snap store This suggests the system had network connectivity issues at the time of the upgrade.
Did re-trying the upgrade get you through to the end eventually? Assuming this is all inside of a container (as your systemd change suggests), an alternative is to just remove the line from the /etc/fstab. Containers will happily boot without that line. ** Changed in: lxd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1933139 Title: package lxd 3.0.3-0ubuntu1~18.04.1 failed to install/upgrade: new lxd package pre-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1933139/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs