Change 1000+ of WordPress Featured Images in 5 Minutes! › Forums › Questions and Answers › Featured images not detected but visible in editor › Reply To: Featured images not detected but visible in editor
The plugin uses the WordPress core function get_post_thumbnail_id() to check the existence of the post’s featured image. That function checks for an entry in the table wp_postmeta with the meta key called _thumbnail_id. If there is no such entry for the post or the value could not be converted into an integer the plugin shows “No featured image set”.
Are there such entries for the respective posts?