plugin does not get images from Metaslider

First off change your AppID to the ID only.. just the number not the full URL to your page.

The thumbnails aren’t going to be able to be pulled out of whatever slider script/plugin you’re using. Unless the images are actually IN the post content – they won’t be pulled. It can’t know how every plugin works to get images out of every one.
The solution however is to add a featured image to the post. Even if that image isn’t displayed on the page the open graph tags will populate with it.

Cheers

Thanks Chuck

I am not inclined to manually add an image to each post to accommodate the shortcomings of communication of plugins.

So, I will look for another solution.

Thanks anyway

Regards

Bernard