We're seeting this issue when using "Modify field values" action added by https://www.drupal.org/project/views_bulk_edit →
1. Install
https://www.drupal.org/project/views_bulk_edit →
https://www.drupal.org/project/views_bulk_operations →
https://www.drupal.org/project/yoast_seo →
2. Add field of type "Real-time SEO status & focused keywords" to your content type
3. Try to bulk update content.
This error should not happen.
Active
Code
I have the same issue in several projects. I have debug to see what kind of form_object is at that state, it is a ConfigureAction form not an entity form. Ideally we would not want the field real-time to appear as a field we can alter in a bulk action.