Install vanilla-gnome-desktop by entering the following commands in the terminal:
sudo apt update sudo apt install vanilla-gnome-desktop
Description:
Vanilla GNOME metapackage
This package depends on the core GNOME packages with minimal Ubuntu branding similar to what was offered by Ubuntu GNOME. Ubuntu GNOME was an Ubuntu flavor that offered a mostly pure GNOME experience until it was discontinued after the 17.04 release. . It is also used to help ensure proper upgrades, so it is recommended that it not be removed.
Version: 0.83
Section: universe/metapackages