Install desktop-base by entering the following commands in the terminal:
sudo apt update sudo apt install desktop-base
common files for the Debian Desktop
This package contains various miscellaneous files which are used by Debian Desktop installations. Currently, it provides some Debian-related artwork and themes, .desktop files containing links to Debian related material (suitable for placement on a user's desktop), and other common files between the available desktop environments such as GNOME and KDE.