Suggession: remove

YARPP generates links without visible images if the main post image is hidden.

It is caused by the fact, that the main post image uses the same css class (“wp-post-image”) as the image thumbnails in get_the_post_thumbnail() used by YARPP. So I suggest changing template_thumbnails.php as follows to remove any classes assigned to the generated by get_the_post_thumbnail().

$post_thumbnail_html = get_the_post_thumbnail( null, $dimensions[‘size’], array( ‘data-pin-nopin’ => ‘true’ ) );
$post_thumbnail_html = preg_replace( ‘/(class)=”[^”]*”/’, ”, $post_thumbnail_html );