package avahi-daemon 0.7-4ubuntu2.1 failed to install/upgrade: installed avahi-daemon package post-installation script subprocess returned error exit status 1

[Francesco]

this error is shown when installing the ubuntu upgrade

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: avahi-daemon 0.7-4ubuntu2.1
ProcVersionSignature: Ubuntu 4.18.0-14.15-generic 4.18.20
Uname: Linux 4.18.0-14-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
Date: Mon Feb 11 09:16:27 2019
ErrorMessage: installed avahi-daemon package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2019-01-03 (38 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.10
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15-3
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu5
 apt 1.7.2
SourcePackage: avahi
Title: package avahi-daemon 0.7-4ubuntu2.1 failed to install/upgrade: installed avahi-daemon package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.avahi.avahi-daemon.conf: 2019-01-16T08:54:28.689053

[Launchpad Janitor (janitor)]

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