Install libplank-common by entering the following commands in the terminal:
sudo apt update sudo apt install libplank-common
Description:
Library to build an elegant, simple, clean dock (shared files)
Plank is a dock enabling you to start applications and manage your windows. . Plank is meant to be the simplest dock on the planet. The goal is to provide just what a dock needs and absolutely nothing more. It is, however, a library which can be extended to create other dock programs with more advanced features. . This package contains the architecture-independent files.
Homepage: https://launchpad.net/plank
Version: 0.11.4-2
Section: universe/utils