WordPress 4.4 release produce blank white images when sharing a post on Facebook etc

Facebook’s URL Debugger (https://developers.facebook.com/tools/debug/) finds the image just fine and I am able to share with the image. It could be that the image was somehow not there or not accessible when you first tried to share the URL. I would try to share it again and see if it works now.

FYI, if you run into issues in the future, use the debug tool linked above and after retrieving the URL click “Fetch new scrape information”. This can clear the Facebook cached info for your URL. This can be very useful if you add or change an image after the post has been shared the first time.