User Facebook thumbnails not loading

Hi again, thought the issue was just limited to SSL certificate expiration, but sadly not – on all client sites, I’m getting an issue with the Facebook Testimonials Feed where the person’s FB image is not loading. The thumbnail looks broken on Chrome, so I’ve again hidden the thumbnail via CSS for now.
=============
.fts-jal-fb-user-thumb {
display: none !important;
}
=============

In console I’m getting this error message for the thumbnail:

===========
picture:1 Failed to load resource: the server responded with a status of 403 (Forbidden)
===========

This same plugin is used for 4 sites owned by the same client, so I’m not sure if I should be looking at the client’s FB settings (which I do not believe have changed) or the settings inside the plugin.

Thanks again
Glen