package python3 3.8.2-0ubuntu2 failed to install/upgrade: installed python3 package post-installation script subprocess returned error exit status 4

[JN]

Python3 update failed during do-release-upgrade from Ubuntu 18.04.6 to 20.04.4 LTS

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: python3 3.8.2-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-187.198-generic 4.15.18
Uname: Linux 4.15.0-187-generic x86_64
NonfreeKernelModules: vboxpci vboxnetadp vboxnetflt vboxdrv nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.28
Architecture: amd64
Date: Sun Jun 19 20:27:40 2022
ErrorMessage: installed python3 package post-installation script subprocess returned error exit status 4
InstallationDate: Installed on 2016-01-30 (2332 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3.2
 apt 2.0.9
SourcePackage: python3-defaults
Title: package python3 3.8.2-0ubuntu2 failed to install/upgrade: installed python3 package post-installation script subprocess returned error exit status 4
UpgradeStatus: Upgraded to focal on 2022-06-20 (0 days ago)

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1957199, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.