package apt-show-versions 0.22.7ubuntu1 failed to install/upgrade: installed apt-show-versions package post-installation script subprocess returned error exit status 25

[Warren Clark]

with webmin

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: apt-show-versions 0.22.7ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
Uname: Linux 4.15.0-24-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
AptOrdering:
 apt-show-versions:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
Date: Mon Jul 16 13:13:07 2018
ErrorMessage: installed apt-show-versions package post-installation script subprocess returned error exit status 25
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.2
SourcePackage: apt-show-versions
Title: package apt-show-versions 0.22.7ubuntu1 failed to install/upgrade: installed apt-show-versions package post-installation script subprocess returned error exit status 25
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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