Comment 1 for bug 1820424

The following error occurs, and may be the cause of the issue.

Traceback (most recent call last):
    File
    "/usr/share/cubic/transition.py",
    line 95, in run self.action()
    File
    "/usr/share/cubic/transition.py",
    line 400, in action self) File
    "/usr/share/cubic/transitions.py",
    line 2631, in transition__from__term
    inal_page__to__manage_options_page
    installed_packages_list = utilities.
    create_installed_packages_list(threa
    d) File
    "/usr/share/cubic/utilities.py",
    line 2424, in
    create_installed_packages_list
    installed_packages_list =
    result.splitlines() AttributeError:
    'NoneType' object has no attribute
    'splitlines'