Installation - GoScribble/Scribble GitHub Wiki
Composer good for you?
composer require scribble/scribble
Not familiar with Composer, here.
Next you need to download and configure the Bridge API for the provider you are working with, this allows the library to communicate with your site.
Follow the instructions in the Bridge's repo.
Finally, rename the Scribble Config/config.example.php to Config/config.php and fill in the settings for the providers you wish to use, ensuring that each nickname is unique.