unusual error in the sharing debugger "URL returned a bad HTTP response code" and consequently images not visible in published posts.

Hello everyone, it is of extreme urgency to solve the problem we are having with images not being displayed when sharing links on Facebook.
By debugging in the Facebook tool https://developers.facebook.com/tools/debug/ any of our links the problem is not resolved and this unusual message appears:
"Warnings that should be corrected: Incorrect response code URL returned a bad HTTP response code."
So when publishing any post on our facebook pages, the image does not appear.
We await resolution as a matter of urgency.
Thank you.