package libdvd-pkg 1.4.2-1-1 failed to install/upgrade: installed libdvd-pkg package post-installation script subprocess returned error exit status 128

[Dieter Drescher]

Ubuntu 18.04 64bit

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: libdvd-pkg 1.4.2-1-1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
Date: Mon Apr 30 19:09:13 2018
ErrorMessage: installed libdvd-pkg package post-installation script subprocess returned error exit status 128
InstallationDate: Installed on 2018-04-30 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /root/Error: command ['which', 'python'] failed with exit code 1:, Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: "/root/Error: command ['which', 'python'] failed with exit code 1:": "/root/Error: command ['which', 'python'] failed with exit code 1:", unpackaged
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: libdvd-pkg
Title: package libdvd-pkg 1.4.2-1-1 failed to install/upgrade: installed libdvd-pkg package post-installation script subprocess returned error exit status 128
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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