Install debconf-kde-helper by entering the following commands in the terminal:
sudo apt update sudo apt install debconf-kde-helper
Description:
Debconf KDE GUI frontend tool
Debconf KDE is a GUI library for including Debconf frontends in Qt-based applications. Debconf is a configuration management system for Debian packages, which is used to ask questions when they are installed. This library is written in C++ and used by Apper and Muon to embed Debconf dialogs. . This package contains a small standalone tool to display a KDE Debconf dialog without linking against the Debconf KDE library.
Homepage: http://projects.kde.org/projects/extragear/sysadmin/libdebconf-kde
Version: 1.0.3-0ubuntu1
Section: universe/kde