When creating a node, under the Thumbnail Image section there are two radio buttons.
( ) No image (Facebook will choose one automatically).
( ) Provide a URL to a custom preview image.
Per default, No image should be selected because if I do nothing I get an error when trying to submit/save the node
"An illegal choice has been detected. Please contact the site administrator."
Active
2.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.