Crash while release update

[Alex]

# /usr/bin/update-manager
Checking for a new Ubuntu release
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py:23: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, Gdk
/usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewerWebkit.py:33: PyGIWarning: WebKit2 was imported without specifying a version first. Use gi.require_version('WebKit2', '4.0') before import to ensure that the right version gets loaded.
  from gi.repository import WebKit2 as WebKit
Gtk-Message: 12:30:49.350: GtkDialog mapped without a transient parent. This is discouraged.
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg'
extracting 'focal.tar.gz'
Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 197, in _get_from_and_to_version
    di.version('%s' % self.controller.fromDist).split()[0]
AttributeError: 'UbuntuDistroInfo' object has no attribute 'version'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-67imrfg1/focal", line 8, in <module>
    sys.exit(main())
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeMain.py", line 238, in main
    if app.run():
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeController.py", line 2089, in run
    return self.fullUpgrade()
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeController.py", line 1926, in fullUpgrade
    if not self.doPostInitialUpdate():
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeController.py", line 924, in doPostInitialUpdate
    self.quirks.run("PostInitialUpdate")
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 99, in run
    func()
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 118, in focalPostInitialUpdate
    self._get_from_and_to_version()
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 203, in _get_from_and_to_version
    (r.version for r in di.get_all("object")
AttributeError: 'UbuntuDistroInfo' object has no attribute 'get_all'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/problem_report.py", line 497, in add_to_existing
    self.write(f)
  File "/usr/lib/python3/dist-packages/problem_report.py", line 450, in write
    block = f.read(1048576)
  File "/usr/lib/python3.6/codecs.py", line 321, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte

Original exception was:
Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 197, in _get_from_and_to_version
    di.version('%s' % self.controller.fromDist).split()[0]
AttributeError: 'UbuntuDistroInfo' object has no attribute 'version'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-67imrfg1/focal", line 8, in <module>
    sys.exit(main())
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeMain.py", line 238, in main
    if app.run():
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeController.py", line 2089, in run
    return self.fullUpgrade()
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeController.py", line 1926, in fullUpgrade
    if not self.doPostInitialUpdate():
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeController.py", line 924, in doPostInitialUpdate
    self.quirks.run("PostInitialUpdate")
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 99, in run
    func()
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 118, in focalPostInitialUpdate
    self._get_from_and_to_version()
  File "/tmp/ubuntu-release-upgrader-67imrfg1/DistUpgrade/DistUpgradeQuirks.py", line 203, in _get_from_and_to_version
    (r.version for r in di.get_all("object")
AttributeError: 'UbuntuDistroInfo' object has no attribute 'get_all'

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.4.0-53-generic 5.4.0-53.59~18.04.1
ProcVersionSignature: Ubuntu 5.4.0-53.59~18.04.1-generic 5.4.65
Uname: Linux 5.4.0-53-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.19
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 11 12:33:44 2020
InstallationDate: Installed on 2019-09-06 (431 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
SourcePackage: linux-signed-hwe-5.4
UpgradeStatus: Upgraded to bionic on 2020-11-11 (0 days ago)