/usr/bin/update-manager:AttributeError:<lambda>:available:start_available:refresh_cache:_get_ua_security_status

[errors.ubuntu.com bug bridge]

Looks like ua.updates() can actually throw an exception. Only that would explain this crash.

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/UpdateManager/Dialogs.py", line 118, in <lambda>
    button.connect("clicked", lambda x: callback())
  File "/usr/lib/python3/dist-packages/UpdateManager/Dialogs.py", line 371, in available
    self.window_main.start_available(error_occurred=True)
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 242, in start_available
    self.refresh_cache()
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 461, in refresh_cache
    self._get_ua_security_status()
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 285, in _get_ua_security_status
    for package in self.ua_updates:
AttributeError: 'UpdateManager' object has no attribute 'ua_updates'

The Ubuntu Error Tracker has been receiving reports about a problem regarding update-manager. This problem was most recently seen with package version 1:22.04.20, the problem page at https://errors.ubuntu.com/problem/ed0e9f0ed8bc4002d808a11e37e4ee9d870e32c1 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.