package postfixadmin 2.3.5-3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

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ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: postfixadmin 2.3.5-3
ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
Uname: Linux 3.13.0-43-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.6
AptOrdering:
 wwwconfig-common: Install
 postfixadmin: Install
 wwwconfig-common: Configure
 postfixadmin: Configure
Architecture: amd64
Date: Thu Feb 5 16:48:13 2015
DuplicateSignature: package:postfixadmin:2.3.5-3:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-01-08 (28 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: postfixadmin
Title: package postfixadmin 2.3.5-3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.postfixadmin.apache.conf: 2015-02-05T17:06:06.635883
mtime.conffile..etc.postfixadmin.config.inc.php: 2015-02-05T17:03:47.303885