package mailman3-web 0+20170523-14 failed to install/upgrade: installed mailman3-web package post-installation script subprocess returned error exit status 1

[Barry Smith]

During configuration in post install, there was a error while trying to configure MySQL. I was using the automatic configuration settings for MySQL.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: mailman3-web 0+20170523-14
ProcVersionSignature: Ubuntu 4.15.0-22.24-lowlatency 4.15.17
Uname: Linux 4.15.0-22-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
Date: Tue May 22 16:52:51 2018
ErrorMessage: installed mailman3-web package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2017-12-14 (159 days ago)
InstallationMedia: Ubuntu-Studio 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: mailman-suite
Title: package mailman3-web 0+20170523-14 failed to install/upgrade: installed mailman3-web package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-05-16 (6 days ago)