Install libpeony-extension-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libpeony-extension-doc
libraries for Peony components (API documentation files)
Peony is the official file manager for the UKUI desktop. It allows one to browse directories, preview files and launch applications associated with them. It is also responsible for handling the icons on the UKUI desktop. It works on local and remote filesystems. . This package contains the API documentation for the libraries needed by Peony's extensions.