/usr/lib/update-notifier/package-data-downloader:ModuleNotFoundError:/usr/lib/update-notifier/package-data-downloader@26

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding update-notifier. This problem was most recently seen with package version 3.186, the problem page at https://errors.ubuntu.com/problem/51d42970b6d72024675f70391af2ee24831e8388 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/.