Trying to embed a Page Plugin but it is not appearing on website even though it is a Public Group

I am the admin of a group ( ) which is a Public Group on Facebook and I am trying to place a Page Plugin on our group's home website. For some reason it is not appearing. Is there something else I have overlooked in the Privacy settings that is causing it not to appear? I am quite happy with the coding side of things on the website. On the Page Plugin Social Plugins page, a preview does not appear either when the Facebook Page URL of the group is entered. Your assistance would be appreciated.

Asked about 6 months ago