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

[Italo Vignoli]

Ubuntu 14.04 Dell OEM

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: prosody (not installed)
ProcVersionSignature: Ubuntu 4.2.0-35.40~14.04.1-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.20
AptOrdering:
 jitsi: Purge
 libjitsi-jni: Purge
 prosody: Configure
Architecture: amd64
Date: Fri Apr 15 22:27:53 2016
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-trusty-amd64-20140620-0
DuplicateSignature: package:prosody:(not installed):subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-02-18 (57 days ago)
InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.5
 apt 1.0.1ubuntu2.12
SourcePackage: prosody
Title: package prosody (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)