Install libakonadi-calendar4 by entering the following commands in the terminal:
sudo apt update sudo apt install libakonadi-calendar4
Description:
library providing calendar helpers for Akonadi items
This library offers helper functions to integrate the use of Akonadi calendar items in applications. . This package is part of the KDE Development Platform PIM libraries module.
Homepage: http://pim.kde.org/
Version: 4:4.14.10-1ubuntu7
Section: universe/libs