unfortunately no image is displayed

good morning,
I apologize for the inconvenience but when I share the pages, on Facebook you only see the writing and no image.

facebook debugging writes these error messages:

“It was not possible to elaborate as image the URL og: image provided https://www.familypet3000.net/wp-content/uploads/2019/07/familypet3000-home-share-facebook.jpg because it presents a type of content invalid.”

“The following necessary properties are missing: fb: app_id”

how do i solve?

thank you
Massimo

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