package libpaper1:amd64 1.1.24+nmu5ubuntu1 failed to install/upgrade: installed libpaper1:amd64 package post-installation script subprocess returned error exit status 1

[Damian Middleton]

Doing an upgrade from 16.04 LTS to 18.04 LTS and had the following issue come up. It said the system may be unusable but it appears to have rebooted OK.

I'm not technical, so apologises if this is already understood and I missed it..

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: libpaper1:amd64 1.1.24+nmu5ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
Uname: Linux 4.4.0-131-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Mon Aug 13 14:23:24 2018
ErrorMessage: installed libpaper1:amd64 package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2016-10-04 (678 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3
SourcePackage: libpaper
Title: package libpaper1:amd64 1.1.24+nmu5ubuntu1 failed to install/upgrade: installed libpaper1:amd64 package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-08-13 (0 days ago)

[Launchpad Janitor (janitor)]

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