Do you have this file?
/usr/share/glib-2.0/schemas/org.gtk.Settings.Debug.gschema.xml
If so then try: sudo glib-compile-schemas /usr/share/glib-2.0/schemas/
Do you have this file?
/usr/share/ glib-2. 0/schemas/ org.gtk. Settings. Debug.gschema. xml
If so then try: schemas /usr/share/ glib-2. 0/schemas/
sudo glib-compile-