package zentyal-core 2.3.4 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 8

Setting up zentyal-core (2.3.4) ...
dpkg: error processing zentyal-core (--configure):
 subprocess installed post-installation script returned error exit status 8
No apport report written because MaxReports is reached already
                                                              dpkg: dependency problems prevent configuration of ebox:
 ebox depends on zentyal-core; however:
  Package zentyal-core is not configured yet.
dpkg: error processing ebox (--configure):
 dependency problems - leaving unconfigured
No apport report written because MaxReports is reached already
                                                              Errors were encountered while processing:
 zentyal-core

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: zentyal-core 2.3.4
ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17
Uname: Linux 3.0.0-16-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Thu Jun 7 17:14:53 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 8
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
SourcePackage: zentyal-core
Title: package zentyal-core 2.3.4 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 8
UpgradeStatus: Upgraded to precise on 2012-06-07 (0 days ago)