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

[Adam Buran]

Ubuntu 13.04 Raring
zentyal-openvpn:
  Installed: (none)
  Candidate: 2.3.10+quantal1
  Version table:
     2.3.10+quantal1 0
        500 http://us.archive.ubuntu.com/ubuntu/ raring/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Package
DistroRelease: Ubuntu 13.04
Package: zentyal-openvpn (not installed)
ProcVersionSignature: Ubuntu 3.8.0-34.49-generic 3.8.13.12
Uname: Linux 3.8.0-34-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: amd64
Date: Sun Dec 8 06:22:36 2013
ErrorMessage: subprocess installed post-removal script returned error exit status 1
InstallationDate: Installed on 2013-12-05 (5 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: zentyal-openvpn
Title: package zentyal-openvpn (not installed) failed to install/upgrade: subprocess installed post-removal 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.