Fatal error: Uncaught Error: Call to undefined function add_shortcode() in /var/sites/b/belfastmediafestival.co.uk/public_html/wp-includes/media.php:1485 Stack trace: #0 {main} thrown in /var/sites/b/belfastmediafestival.co.uk/public_html/wp-includes/media.php on line 1485