Martin

Guys, if I have to slap some code on a plugin in order to prevent the backend from crashing, something is seriously wrong. Particularly as we are talking about a run of mill WP installation.

Please let us know, when you have found and more importantly fixed the bug.

Thanks for getting back to me. I’m running PHP 7.3

This is actually not true. Publisher can be a person or an organization according to schema.org.

I suspect that the faulty implementation of the publisher logo via gravatar is the culprit. The gravatar logo does not conform to the 60px / 600px Google standard fpr a publisher logo