Error 500 when using advanced sharing mode with post without image

Hi,

I found a bug. When we activate the Advanced share method, and a post doesn’t have a featured image, it’s cause an error, because the function get_the_post_thumbnail_url() doesn’t get an image (on line 498 and 610 of wp-linkedin-auto-publish.php).

For my need I’ve done a quick fix like this for the two places :

if ( has_post_thumbnail() ) {
            $json = json_encode( array(
                'visibility' => array(
                    'code' => $options['wp_linkedin_autopublish_share_with']
                ),
                'comment' => $linkedinComment,
                'content' => array(
                    'submitted‐image-url' => get_the_post_thumbnail_url($post->ID, 'full'),
                    'title' => html_entity_decode(get_the_title($post->ID)),
                    'submitted-url' => get_permalink($post->ID),
                    'description' => get_the_excerpt($post->ID)
                ),
            ) );
        } else {
            $json = json_encode( array(
                'visibility' => array(
                    'code' => $options['wp_linkedin_autopublish_share_with']
                ),
                'comment' => $linkedinComment,
                'content' => array(
                    'title' => html_entity_decode(get_the_title($post->ID)),
                    'submitted-url' => get_permalink($post->ID),
                    'description' => get_the_excerpt($post->ID)
                ),
            ) );
        }

But I’m not a developper, so there maybe/probably a best way to fix this.

I will stay tuned for next update, because I hate to have to modify plugin file!

Thank you,

Benjamin Dubé