Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/sweves.se/httpdocs/wp-content/plugins/html5-video-player/inc/admin.php:8 Stack trace: #0 /var/www/sweves.se/httpdocs/wp-content/plugins/html5-video-player/inc/admin.php(88): H5VPAdmin->__construct() #1 /var/www/sweves.se/httpdocs/wp-content/plugins/html5-video-player/html5-video-player.php(21): require_once('/var/www/sweves...') #2 {main} thrown in /var/www/sweves.se/httpdocs/wp-content/plugins/html5-video-player/inc/admin.php on line 8