Install gnome-panel-data by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-panel-data
Description:
common files for the GNOME Panel
This package includes some files that are needed by the GNOME Panel (Pixmaps, .desktop files and internationalization files).
Homepage: https://wiki.gnome.org/Projects/GnomePanel
Version: 1:3.26.0-1ubuntu5
Section: universe/gnome