Install kdepim-addons by entering the following commands in the terminal:
sudo apt update sudo apt install kdepim-addons
Description:
Addons for KDE PIM applications
KDE (the K Desktop Environment) is a powerful Open Source graphical desktop environment for Unix workstations. It combines ease of use, contemporary functionality, and outstanding graphical design with the technological superiority of the Unix operating system. . This package includes a collection of extensions for the Personal Information Management (PIM) desktop applications provided with the official release of KDE Applications.
Homepage: https://pim.kde.org/
Version: 17.12.3-0ubuntu2
Section: universe/kde