Install kdebase-runtime by entering the following commands in the terminal:
sudo apt update sudo apt install kdebase-runtime
Description:
Transitional package for the KDE runtime components
KDE is produced by an international technology team that creates free and open source software for desktop and portable computing. Among KDE's products are a modern desktop system for Linux and UNIX platforms, comprehensive office productivity and groupware suites and hundreds of software titles in many categories including Internet and web applications, multimedia, entertainment, educational, graphics and software development. . This transitional package takes care of pulling in the new kde-runtime package and can safely be removed after installation.
Homepage: http://www.kde.org/
Version: 4:17.08.3-0ubuntu1
Section: universe/kde