Comment 13 for bug 1875523

Please forgive our ignorance but what is the best way to download and install this (1:20.04.22) package?
 It does not show in synaptic.

We cannot upgrade to 20.04 after hours of dealing with this bug. package installed is ubuntu-release-updater-co 1.18.04.44
What is solution?
This did not work for us:
sudo apt remove python-gi
sudo do-release-upgrade -d

Upgrade says An unresolvable problem occurred while calculating the upgrade.

'/var/log/dist-upgrade' ends with:

2021-05-07 17:16:42,955 INFO failed to remove python-minimal
2021-05-07 17:16:42,955 INFO checking for python-dev (auto_inst=True)
2021-05-07 17:16:42,955 INFO checking for libpython-dev (auto_inst=True)
2021-05-07 17:16:42,955 INFO checking for libpython-stdlib (auto_inst=True)
2021-05-07 17:16:42,955 INFO removing libpython-stdlib because None is being installed
2021-05-07 17:16:42,955 DEBUG Removing 'libpython-stdlib' (None is being installed on the system)
2021-05-07 17:16:42,956 INFO failed to remove libpython-stdlib
2021-05-07 17:16:42,956 INFO checking for libpython-dbg (auto_inst=True)
2021-05-07 17:16:43,614 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2021-05-07 17:16:43,615 DEBUG abort called