Thank you for the guidance. Just FYI, several other pages would not display even though the og:image tag was present, but I fixed those by removing the image (via Yoast), saving, and then inserting the image again. And then it worked.
All the pages appear to be working now, but on all of them, the Facebook debugger has this Warning:
“Missing Properties The following required properties are missing: fb:app_id”
Let me know if that requires a fix.
