Uncaught Error в плагине Wordpress

Пытаюсь написать плагин и при его активации выдает вот такое сообщение

“Fatal error: Uncaught Error: Call to a member function run() on null in C:\MAMP\htdocs\wordpress\wp-content\plugins\video-gallery\includes\class-video-gallery.php:49 Stack trace: #0 C:\MAMP\htdocs\wordpress\wp-content\plugins\video-gallery\video-gallery.php(47): Video_Gallery->run() #1 C:\MAMP\htdocs\wordpress\wp-content\plugins\video-gallery\video-gallery.php(55): run_video_gallery() #2 C:\MAMP\htdocs\wordpress\wp-admin\includes\plugin.php(1943): include('C:\MAMP\htdocs\...') #3 C:\MAMP\htdocs\wordpress\wp-admin\plugins.php(164): plugin_sandbox_scrape('video-gallery/v...') #4 {main} thrown in C:\MAMP\htdocs\wordpress\wp-content\plugins\video-gallery\includes\class-video-gallery.php on line 49”

Ругается на вот эту функцию как я понимаю :

class Video_Gallery_Loader {
protected $actions;
protected $filters;

public function __construct() {
    $this->actions = array();
    $this->filters = array();
}

public function add_action( $hook, $component, $callback ) {
    $this->actions = $this->add( $this->actions, $hook, $component, $callback );
}
public function add_filter( $hook, $component, $callback ) {
    $this->filters = $this->add( $this->filters, $hook, $component, $callback );
}
private function add( $hooks, $hook, $component, $callback ) {

    $hooks[] = array(
        'hook'      => $hook,
        'component' => $component,
        'callback'  => $callback
    );

    return $hooks;

}

    public function run() {

    foreach ( $this->filters as $hook ) {
        add_filter( $hook['hook'], array( $hook['component'], $hook['callback'] ) );
    }

    foreach ( $this->actions as $hook ) {
        add_action( $hook['hook'], array( $hook['component'], $hook['callback'] ) );
    }

}