Ubuntu
update-notifier package

  1. Bug #1978120
  2. Comment #2

Comment 2 for bug 1978120

Revision history for this message
Steve Langasek (vorlon) wrote :

The error in your log is:

  File "/usr/lib/update-notifier/package-data-downloader", line 24, in <module>
    import debian.deb822
ModuleNotFoundError: No module named 'debian'

The update-notifier-common package depends on python3-debian. The fact that this is not found on your system means that you have broken your system's python installation and /usr/bin/python3 is no longer able to find the debian python module that's installed.

You will need to fix your python install to continue your upgrade. 'sudo apt install --reinstall python3.9-minimal python3' may help you with this.