Install cinnamon-session-common by entering the following commands in the terminal:
sudo apt update sudo apt install cinnamon-session-common
Cinnamon Session Manager - common files
The Cinnamon Session Manager is in charge of starting the core components of the Cinnamon desktop, and applications that should be launched at login time. It also features a way to save and restore currently running applications. . This package contains the translations, data files and startup scripts which are common to the Cinnamon and Cinnamon fallback sessions.