Same issue: after upgrading from Ubuntu 20.04 to 20.10 my Virtualbox
installation was missing (removed as part of the upgrade). Attempts to
re-install indicated a conflict between the python pre-req and dh-
python. I performed the following and all appears to be working now:
sudo apt remove
Public bug reported:
Running the command from a terminal window The following messages are
logged when the hang occurs:
simon@Ubuntu-2600K:~$ sudo software-properties-gtk
Traceback (most recent call last):
File
"/usr/lib/python3/dist-packages/softwareproperties/gtk/DialogCacheOutdated.py",
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