Install xsettingsd by entering the following commands in the terminal:
sudo apt update sudo apt install xsettingsd
Description:
Provides settings to X11 applications
xsettingsd is a daemon that implements the XSETTINGS specification. It is intended to be small, fast, and minimally dependent on other libraries. It can serve as an alternative to gnome-settings-daemon for users who are not using the GNOME desktop environment but who still run GTK+ applications and want to configure things such as themes, font antialiasing/hinting, and UI sound effects.
Homepage: https://github.com/derat/xsettingsd
Version: 0.0.20171105+1+ge4cf9969-1
Section: universe/x11