Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/sweves.se/httpdocs/wp-content/plugins/html5-video-player/inc/Base/duplicate-player.php:20 Stack trace: #0 {main} thrown in /var/www/sweves.se/httpdocs/wp-content/plugins/html5-video-player/inc/Base/duplicate-player.php on line 20