package python3-gst-1.0 1.14.5-0ubuntu1~18.04.1 failed to install/upgrade: installed python3-gst-1.0 package post-installation script subprocess returned error exit status 1

[joud]

Hallo,
In fact it's Updatemanager which crashes in the middle of an updrade ! So, nothing works .
Thanks

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: python3-gst-1.0 1.14.5-0ubuntu1~18.04.1
ProcVersionSignature: Ubuntu 4.15.0-36.39-lowlatency 4.15.18
Uname: Linux 4.15.0-36-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
Date: Wed Aug 7 18:18:42 2019
ErrorMessage: installed python3-gst-1.0 package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2016-10-12 (1028 days ago)
InstallationMedia: Ubuntu-Studio 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Python3Details: /usr/bin/python3.6, Python 3.6.8, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.1
 apt 1.6.11
SourcePackage: gst-python1.0
Title: package python3-gst-1.0 1.14.5-0ubuntu1~18.04.1 failed to install/upgrade: installed python3-gst-1.0 package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)