Comment 29 for bug 1969786

I have the same problem on upgrading 20.04 to 22.04

release-upgrader version '22.04.15'

Brian, I've attached the /var/log/dist-upgrade logs:
apt.log
apt-term.log
history.log
main.log

Let me know if you need anything else.

From main.log:
----------------------------------------------------
2023-03-02 15:52:37,810 ERROR not handled exception:
Traceback (most recent call last):

  File "/tmp/ubuntu-release-upgrader-mowqr6lm/jammy", line 8, in <module>
    sys.exit(main())

  File "/tmp/ubuntu-release-upgrader-mowqr6lm/DistUpgrade/DistUpgradeMain.py", line 241, in main
    if app.run():

  File "/tmp/ubuntu-release-upgrader-mowqr6lm/DistUpgrade/DistUpgradeController.py", line 2042, in run
    return self.fullUpgrade()

  File "/tmp/ubuntu-release-upgrader-mowqr6lm/DistUpgrade/DistUpgradeController.py", line 1991, in fullUpgrade
    if not self.calcDistUpgrade():

  File "/tmp/ubuntu-release-upgrader-mowqr6lm/DistUpgrade/DistUpgradeController.py", line 1100, in calcDistUpgrade
    if not self.cache.installTasks(self.tasks):

AttributeError: 'DistUpgradeController' object has no attribute 'tasks'

2023-03-02 15:52:37,810 DEBUG running apport_crash()