Install plasma-discover-common by entering the following commands in the terminal:
sudo apt update sudo apt install plasma-discover-common
Description:
Discover software manager suite (common data files)
Discover is a graphical software manager for the Plasma workspace. . This package contains data files shared by various parts of the Discover suite.
Homepage: https://projects.kde.org/projects/kde/workspace/discover
Version: 5.12.4-0ubuntu1
Section: universe/kde