Error with download: Unable to complete SSL connection (https://api.facepunch.com/api/public/manifest/?public_key=j0VF6sNnzn9rwt

Running my own server through a host website. I’ve recently started receiving this error “Error with download: Unable to complete SSL connection (https://api.facepunch.com/api/public/manifest/?public_key=j0VF6sNnzn9rwt9qTZtI02zTYK8PRdN1)”. I emailed the host site and they said they haven’t seen it before. Can anyone help?