Install ukui-session-manager by entering the following commands in the terminal:
sudo apt update sudo apt install ukui-session-manager
Description:
Session manager of the UKUI desktop environment
This package contains a session that can be started from a display manager such as MDM. It will load all necessary applications for a full-featured user session. . The session manager also features the ability to save a running session and restore it later. . This version is configured to start the UKUI desktop, based on the UKUI panel.
Homepage: http://www.ukui.org/
Version: 1.1.2-0ubuntu1
Section: universe/x11