Images are not showing when sharing links, we've checked the Sharing Debugger and are getting the error message "Provided og:image URL encountered an unknown error". This is across several sites and business pages.
We have the same problem
Same here in Italy since yesterday.
Same here in Brazil.
Experience this problem recently. Facebook not getting the images. Then more recent was the pages themselves returning 403. I have not blocked any sites. Twitter works fine.
Same here
I have the same problem with over 50 news sites.