Image doesn't load anymore when sharing a link on social networks?

Hello guys.
So I’ve had this issue for a month or so, the image of the page is not loading when sharing its link on social networks, even though I did add it in the dynamic page properties, only the title is displayed. (see images below)

Everything was working well before a month or so. I tried emptying the cache and republishing the website but it won’t work.

Any idea how to fix this? Thanks!

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bump, still occurring