package lxd 3.0.0-0ubuntu4 failed to install/upgrade: new lxd package pre-installation script subprocess returned error exit status 1

[Houman]

Upgrading from Ubuntu 18.04 to 20.04

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: lxd 3.0.0-0ubuntu4
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun Dec 27 00:28:59 2020
ErrorMessage: new lxd package pre-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2020-12-26 (0 days ago)
InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.2
SourcePackage: lxd
Title: package lxd 3.0.0-0ubuntu4 failed to install/upgrade: new lxd package pre-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to focal on 2020-12-26 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Stéphane Graber (stgraber)]

- Setup snap "core" (10577) security profiles (cannot setup udev for snap "core": cannot reload udev rules: exit status 1

Is that an update running inside of a privileged LXD container by any chance?

[Launchpad Janitor (janitor)]

[Expired for lxd (Ubuntu) because there has been no activity for 60 days.]