package base-passwd 3.5.49ubuntu1 failed to install/upgrade: installed base-passwd package post-installation script subprocess returned error exit status 4

[Jason Slaughter]

Error received on do-release-upgrade.

ProblemType: Package
DistroRelease: Ubuntu 21.04
Package: base-passwd 3.5.49ubuntu1
ProcVersionSignature: Ubuntu 5.8.0-63.71-generic 5.8.18
Uname: Linux 5.8.0-63-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.7
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sat Aug 7 01:21:35 2021
ErrorMessage: installed base-passwd package post-installation script subprocess returned error exit status 4
InstallationDate: Installed on 2018-04-08 (1216 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
Python3Details: /usr/bin/python3.9, Python 3.9.5, python3-minimal, 3.9.4-1
PythonDetails: N/A
RebootRequiredPkgs:
 libc6
 libc6
RelatedPackageVersions:
 dpkg 1.20.9ubuntu1
 apt 2.1.10ubuntu0.3
SourcePackage: base-passwd
Title: package base-passwd 3.5.49ubuntu1 failed to install/upgrade: installed base-passwd package post-installation script subprocess returned error exit status 4
UpgradeStatus: Upgraded to hirsute on 2021-08-06 (0 days ago)

[Launchpad Janitor (janitor)]

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