Unable to install cubemap on Dell 3550:package cubemap 1.2.1-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Maurice Tait]

cubemap installation failed (again) during system update.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: cubemap 1.2.1-1
ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
Uname: Linux 4.4.0-131-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Mon Aug 6 11:55:10 2018
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2018-07-11 (25 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.27
SourcePackage: cubemap
Title: package cubemap 1.2.1-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)