package mon 1.2.0-9 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1

[And a Lion]

 failed to install

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mon 1.2.0-9
ProcVersionSignature: Ubuntu 4.4.0-38.57-lowlatency 4.4.19
Uname: Linux 4.4.0-38-lowlatency i686
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: i386
Date: Fri Sep 23 02:20:01 2016
ErrorMessage: subprocess installed post-removal script returned error exit status 1
InstallationDate: Installed on 2016-08-12 (41 days ago)
InstallationMedia: Ubuntu-Studio 16.04.1 LTS "Xenial Xerus" - Release i386 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: mon
Title: package mon 1.2.0-9 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)