package luarocks (not installed) failed to install/upgrade: installed luarocks package post-installation script subprocess returned error exit status 1

[Tangent Fox]

After attempting an install from instructions on https://luarocks.org/ for version 3.0.0 failed, I fell back to the version in Ubuntu's packages. This failed to install. On Ubuntu 18.04.1 LTS

luarocks:
  Installed: (none)
  Candidate: 2.4.2+dfsg-1
  Version table:
     2.4.2+dfsg-1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu bionic/universe i386 Packages

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: luarocks (not installed)
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: kpatch_livepatch_Ubuntu_4_15_0_20_21_generic_42
ApportVersion: 2.20.9-0ubuntu7.2
AptOrdering:
 lua-any:amd64: Install
 lua-socket:amd64: Install
 lua-sec:amd64: Install
 luarocks:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
Date: Mon Aug 20 09:50:47 2018
ErrorMessage: installed luarocks package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-08-20 (1 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
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 1.6.3
SourcePackage: luarocks
Title: package luarocks (not installed) failed to install/upgrade: installed luarocks package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)