Case 1: Load mix content with help of plugin
Really Simple SSL plugin has “force change mixed content” which mean it kept forcing every link on the site to http…
Some Features that useful
The mixed content scan, which shows you what you have to do if you don't have the green lock yet
The option to enable HTTP Strict Transport Security
The option to configure your site for the HSTS preload list
Mixed Content Fixer for the back-end
More detailed feedback on the configuration page.
https://wordpress.org/plugins/really-simple-ssl/
Case 2: Manually Add Facebook Open Graph Meta Data into Your WordPress Theme
//Adding the Open Graph in the Language Attributes
function add_opengraph_doctype( $output ) {
return $output . ' xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml"';
}
add_filter('language_attributes', 'add_opengraph_doctype');
//Lets add Open Graph Meta Info
function insert_fb_in_head() {
global $post;
if ( !is_singular()) //if it is not a post or a page
return;
echo '<meta property="fb:admins" content="YOUR USER ID"/>';
echo '<meta property="og:title" content="' . get_the_title() . '"/>';
echo '<meta property="og:type" content="article"/>';
echo '<meta property="og:url" content="' . get_permalink() . '"/>';
echo '<meta property="og:site_name" content="Your Site NAME Goes HERE"/>';
if(!has_post_thumbnail( $post->ID )) { //the post does not have featured image, use a default image
$default_image="http://example.com/image.jpg"; //replace this with a default image on your server or an image in your media library
echo '<meta property="og:image" content="' . $default_image . '"/>';
}
else{
$thumbnail_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'medium' );
echo '<meta property="og:image" content="' . esc_attr( $thumbnail_src[0] ) . '"/>';
}
echo "
";
}
add_action( 'wp_head', 'insert_fb_in_head', 5 );
Other Solution
First you have to change url Please check FB guide lines
https://developers.facebook.com/docs/plugins/faqs#faq_1149655968420144
You will need to instruct the facebook crawler to re-scrape your url for the changes to take effect:
https://developers.facebook.com/tools/debug/sharing