Cant show a gallery , why?

https://www.facebook.com/media/set/?set=a.1575819022707121.100008371149084&type=3

This is the gallery, is public
is not working 🙁

This facebook link is not public
Unsupported get request. Please read the Graph API documentation at https://developers.facebook.com/docs/graph-api

https://wordpress.org/plugins/wp-embed-facebook/