meta og:image not working for my wordpress website using SSL

Your open graph data appears to be working fine (FB sharing debugger, iframely).

This points to an issue with Skype. Skype caches its link metadata (including images) both in the cloud and on your computer. There are instructions on the Skype forums to clear your local cache, but you’ll just have to wait for the cloud cache to update.

When I entered the link into a WhatsApp conversation, the image appeared as desired:

I suspect Skype will follow suit shortly, and that this is just a caching issue. I’ve faced similar issues with Facebook & Twitter posts when updating metadata - in my experience it can take up to a week for the changes to propagate fully.

for whatsapp sharing you simply use

<a href="whatsapp://send?text=https://mybizcart.com.my/url_of_page/" target="_blank"><i class="fa fa-whatsapp fa-3x" aria-hidden="true"></i><span class="hidden-xs">whatsapp</span></a>

First, you can scan your URL on Social Debug I already scan your URL and Find some issue your ranking is C so try to make it A.

Also the same issue we face we wasted almost a week to figure out what happens some time cache or a server timeout.

Don't use plugins because it's a mash-up with your code output we made a simple script just that script at the end of your function.php file

//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

add_action('wp_head', 'fc_opengraph');
function fc_opengraph() {
if( is_single() || is_page() ) {
$post_id = get_queried_object_id();
$url = get_permalink($post_id);
    $title = get_the_title($post_id);
    $site_name = get_bloginfo('name');
$description = wp_trim_words( get_post_field('post_content', $post_id), 25 );
$image = get_the_post_thumbnail_url($post_id);
    if( !empty( get_post_meta($post_id, 'og_image', true) ) ) 
    {   
        $image = get_post_meta($post_id, 'og_image', true);
    } else {
        $image = 'set your image URl here';
    }
$locale = get_locale();
    echo '<meta name="description" content="Put your website description here">';
    echo '<meta property="og:locale" content="' . esc_attr($locale) . '" />';
    echo '<meta property="og:type" content="article" />';
    echo '<meta property="og:title" content="' . esc_attr($title) . ' | ' . esc_attr($site_name) . '" />';
    echo '<meta property="og:description" content="' . esc_attr($description) . '" />';
    echo '<meta property="og:url" content="' . esc_url($url) . '" />';
    echo '<meta property="og:site_name" content="' . esc_attr($site_name) . '" />';
if($image) echo '<meta property="og:image" content="' . esc_url($image) . '" />';
// Twitter Card
    echo '<meta name="twitter:card" content="summary" />';
    echo '<meta name="twitter:site" content="@yourtwitterhandle" />';
    echo '<meta name="twitter:creator" content="@yourtwitterhandle" />';
    echo '<meta name="twitter:title" content="' . esc_attr($title) . ' | ' . esc_attr($site_name) . '" />';
    echo '<meta name="twitter:description" content="' . esc_attr($description) . '" />';
      echo '<meta name="twitter:image" content="' . esc_attr($image) . '" />';
  }
}

It seems a problem with Skype cache, which happened to me too, I usually add a random query string to the link, like https://mybizcart.com.my/?random-1234 to bypass the cache

You can use yoast plugin. It fixed the same issue for me. Once installed, you can visit its options: Social-> Facebook, there you need to set the image. After setting the default image yous issue will be fixed.