package update-notifier-common 3.192.40.4 failed to install/upgrade: installed update-notifier-common package post-installation script subprocess returned error exit status 1

[Ivan Snezhok]

Can`t update my server side ubuntu

ProblemType: Package
DistroRelease: Ubuntu 21.04
Package: update-notifier-common 3.192.40.4
ProcVersionSignature: Ubuntu 5.11.0-49.55-generic 5.11.22
Uname: Linux 5.11.0-49-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.4
Architecture: amd64
CasperMD5CheckResult: pass
Date: Thu Jun 9 12:59:46 2022
ErrorMessage: installed update-notifier-common package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2021-05-29 (375 days ago)
InstallationMedia: Ubuntu-Server 21.04 "Hirsute Hippo" - Release amd64 (20210421)
PackageArchitecture: all
Python3Details: /usr/bin/python3.9, Python 3.9.5, python3-minimal, 3.9.4-1
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.18-9
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
 dpkg 1.20.9ubuntu1
 apt 2.2.4ubuntu0.1
SourcePackage: update-notifier
Title: package update-notifier-common 3.192.40.4 failed to install/upgrade: installed update-notifier-common package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to hirsute on 2022-06-09 (0 days ago)

[Steve Langasek (vorlon)]

The error in your log is:

  File "/usr/lib/update-notifier/package-data-downloader", line 24, in <module>
    import debian.deb822
ModuleNotFoundError: No module named 'debian'

The update-notifier-common package depends on python3-debian. The fact that this is not found on your system means that you have broken your system's python installation and /usr/bin/python3 is no longer able to find the debian python module that's installed.

You will need to fix your python install to continue your upgrade. 'sudo apt install --reinstall python3.9-minimal python3' may help you with this.