i got the same problem. In the Google Webmaster Tools there are a new section called Structured Data for the Rich Snippets. And there are now some Errors for the hAtom microformats like “entry-titel” is missing, or “Author” is missing and “updated” is missing. I found this one:
https://www.davidtiong.com/fix-hatom-microformats-at-least-one-field-must-be-set-for-hatomentry/
I tried to fix it like mentioned in the above link, but didn`t work in my fruitful Theme Configuration.
Any suggestion?
