E: nagios3-common: subprocess installed post-installation script returned error exit status 1

[Arnezt]

E: nagios3-common: subprocess installed post-installation script returned error exit status 1
E: nagios3-cgi: dependency problems - leaving unconfigured
E: nagios3-core: dependency problems - leaving unconfigured
E: nagios3: dependency problems - leaving unconfigured

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: nagios3-common 3.2.3-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Sun Nov 13 09:11:42 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
SourcePackage: nagios3
Title: package nagios3-common 3.2.3-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to natty on 2011-11-13 (0 days ago)

[Dave Walker (davewalker)]

Setting up nagios3-common (3.2.3-1ubuntu1) ...
 * Starting nagios3 monitoring daemon nagios3 
Nagios Core 3.2.3
Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 10-03-2010
License: GPL

Website: http://www.nagios.org
Reading configuration data...
   Read main config file okay...
Processing object config file '/etc/nagios3/commands.cfg'...
Processing object config directory '/etc/nagios-plugins/config'...
Error: Could not open config directory '/etc/nagios-plugins/config' for reading.
   Error processing object config files!

***> One or more problems was encountered while processing the config files...

     Check your configuration file(s) to ensure that they contain valid
     directives and data defintions. If you are upgrading from a previous
     version of Nagios, you should be aware that some variables/definitions
     may have been removed or modified in this version. Make sure to read
     the HTML documentation regarding the config files, as well as the
     'Whats New' section to find out what has changed.

 * errors in config!

[fail]
invoke-rc.d: initscript nagios3, action "start" failed.
dpkg: error processing nagios3-common (--configure):
 subprocess installed post-installation script returned error exit status 1

[Launchpad Janitor (janitor)]

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