EmbedPress has stopped working

Hi,
I have had EmbedPress working successfully up till very recently, sorry I can’t be more specific, but I am assuming this may be in the last few days as my client has just reported the issue…

I am not sure if this is a ‘red herring’ or not but the test version of the site is still working correctly on Version 2.1.1, whereas the live site is running Version 2.1.2

Apart from plugin updates the site is running on the same version of WordPress (4.9.6) and the same version of the theme.

The page I need help with: [log in to see the link]