package mantis 1.2.11-1.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Verhagen]

Installing Mantis, in combination with Apache 2.4, not successful.
See detailed description: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=669831

ProblemType: Package
DistroRelease: Ubuntu 13.10
Package: mantis 1.2.11-1.2
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Tue Nov 12 13:46:16 2013
DuplicateSignature: package:mantis:1.2.11-1.2:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2013-11-12 (0 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: mantis
Title: package mantis 1.2.11-1.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.