Install caja-actions-dev by entering the following commands in the terminal:
sudo apt update sudo apt install caja-actions-dev
Caja extension to create custom actions (development files)
Caja-actions is an extension for Caja file manager which allows the user to add arbitrary program to be launched through the Caja file manager popup menu of selected files. . This package contains the development files for the libraries needed by Caja's extensions.