[Plugin: WP-O-Matic] Some images not appearing

Using the latest versions, I find that inages from the feed from my main site https://www.esinem.com are not showing, I get the red X. If I click on these, it takes me to the image. Images in other people’s feeds seem OK. BTW, the images are NSFW ??

Here’s my feed page: https://kinbaku.co.uk/news/

A feed from my site with missing images: https://kinbaku.co.uk/manolo-remmid-david-briggs-our-fantastic-bound-photographers/

Here’s the image if you click on a red X: https://esinem.com/news/manolo-remmid-david-briggs-our-fantastic-bound-photographers/attachment/552630_10151239802996211_2051289361_n

Here’s a post from my site that includes blog entry made with PresThis with working images: https://kinbaku.co.uk/kinbaku-in-tokyo-a-bondage-night-with-arisue-go-2/

Here’s a post from somebody else’s site which workks perfectly: https://kinbaku.co.uk/angelina-photography-by-jerome-g-www-ilovefrenchgirls-com/

The only posts from my site that seem to work are those with images outside my WordPress installation. The missing images are all in my main site’s media library. It it likely to be some setting on my server preventing the images being linked? They are not behind the membership wall.

Wassup?