"Page Not Found" Error When Sharing on Facebook

Hi,

When trying to share one of our articles on Facebook, I keep getting a “Page Not Found” link appear. When I click on the link it is correct and loads the proper article however where the article thumbnail should populate info about the article it simply states “Page Not Found”. The article will post correctly through our Blog’s Facebook page but it is only when I try to post through my personal account that this error message appears.

I noticed that on WordPress our Facebook connection does not seem to be working correctly as per error message:
“This connection may not be working correctly” found in Settings –> Sharing.

Are these two related? If someone could help me figure out how to get the thumbnail sharing properly it would be greatly appreciated!

Thanks,