package phpmyadmin 4:4.6.6-5 failed to install/upgrade: installed phpmyadmin package post-installation script subprocess returned error exit status 10

[Wesley D. Koerber]

Description: Ubuntu 18.10
Release: 18.10

phpmyadmin:
  Installed: 4:4.6.6-5
  Candidate: 4:4.6.6-5
  Version table:
 *** 4:4.6.6-5 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic/universe amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu cosmic/universe i386 Packages
        100 /var/lib/dpkg/status

Expected to login via localhost through firefox, but did not work. I was presented with php code on the web browser.

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: phpmyadmin 4:4.6.6-5
ProcVersionSignature: Ubuntu 4.18.0-12.13-generic 4.18.17
Uname: Linux 4.18.0-12-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
Date: Thu Dec 20 10:33:19 2018
ErrorMessage: installed phpmyadmin package post-installation script subprocess returned error exit status 10
InstallationDate: Installed on 2018-12-19 (1 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.10
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15-3
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu5
 apt 1.7.0
SourcePackage: phpmyadmin
Title: package phpmyadmin 4:4.6.6-5 failed to install/upgrade: installed phpmyadmin package post-installation script subprocess returned error exit status 10
UpgradeStatus: No upgrade log present (probably fresh install)