Install libayatana-appindicator0.1-cil by entering the following commands in the terminal:
sudo apt update sudo apt install libayatana-appindicator0.1-cil
Description:
CLI bindings for libayatana-appindicator
This package provides the appindicator-sharp assembly that allows CLI (.NET) programs to take menus from applications and place them in the panel. . This package contains assemblies to be used by Mono applications.
Homepage: https://github.com/AyatanaIndicators/libayatana-appindicator
Version: 0.5.3-3
Section: universe/cli-mono