Missing hEntry. Google search console complaining

Hi,
I have the following errors for all my pages in google search console :
Missing field : author
Missing field : entry-title
Missing field : updated

According to Yoast SEO blogpost I should contact the theme devlopper for a fix :
https://www.google.com/amp/s/kb.yoast.com/kb/fixing-hcard-author-error/amp/

Am I missing something ?

Thanks for your help.