Install gconf2-common by entering the following commands in the terminal:
sudo apt update sudo apt install gconf2-common
Description:
GNOME configuration database system (common files)
GConf is a configuration database system for storing application preferences. It supports default or mandatory settings set by the administrator, and changes to the database are instantly applied to all running applications. It is written for the GNOME desktop but doesn't require it. . This package contains the default configuration and localization files.
Homepage: http://projects.gnome.org/gconf/
Version: 3.2.6-4ubuntu1
Section: universe/libs