Install breeze-icons-rcc by entering the following commands in the terminal:
sudo apt update sudo apt install breeze-icons-rcc
Description:
Transitional package for breeze-icon-theme-rcc
This is a transitional package for breeze-icon-theme-rcc and can safely be removed after installation.
Homepage: https://projects.kde.org/projects/kde/frameworks/breeze-icons
Version: 4:5.44.0-0ubuntu1
Section: universe/kde