Course start date on certificate shows short code

I have upgraded to 4.0 and now the student course start date on the certificate shows the shortcode. screenshot. https://snipboard.io/Ya701z.jpg for 3.0. I was given this code to insert. I don't know if this is still valid for 4.0. or is there another shortcode for 4.0? add_shortcode('certificate_course_start_date',function($atts, $content = null){ $uid=$_GET['u']; $cid=$_GET['c']; global $bp,$wpdb; if(isset($uid) && is_numeric($uid) && isset($cid) && is_numeric($cid) && get_post_type($cid) == 'course'){ $course_submission_date = $wpdb->get_var($wpdb->prepare( " SELECT activity.date_recorded FROM {$bp->activity->table_name} AS activity WHERE activity.component = 'course' AND activity.type = 'start_course' AND user_id = %d AND item_id = %d ORDER BY date_recorded DESC LIMIT 0,1 " ,$uid,$cid)); return date_i18n(get_option( 'date_format' ), strtotime($course_submission_date)); } return '[certificate_course_start_date]'; });