Error in image advanced

My code is follow:

add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );
function your_prefix_register_meta_boxes( $meta_boxes ) {
    $meta_boxes[] = array (
        'title' => 'Carácteristicas',
        'id' => 'caracteristicas',
        'post_types' => array(
            0 => 'fincas',
        ),
        'context' => 'after_title',
        'priority' => 'high',
        'autosave' => true,
        'fields' => array(
            array (
                'id' => 'codigo',
                'type' => 'text',
                'name' => 'Código',
                'required' => 1,
            ),
            array (
                'id' => 'url',
                'type' => 'url',
                'name' => 'Video',
            ),
            array (
                'id' => 'capacidad',
                'type' => 'number',
                'name' => 'Capacidad de Personas Máxima',
                'required' => 1,
            ),
            array (
                'id' => 'camas',
                'type' => 'number',
                'name' => 'Número de Camas',
                'required' => 1,
            ),
            array (
                'id' => 'habitaciones',
                'type' => 'number',
                'name' => 'Número de Habitaciones',
            ),
            array (
                'id' => 'galerias',
                'type' => 'image_advanced',
                'name' => 'Galeria de imágenes',
                'image_size' => 'thumbnail',
                'max_status' => false,
            ),
        ),
    );
    return $meta_boxes;
}

Sorry I fixed it, was a conflict with other plugin: Real Media, I ubdated it and now work correctly. Thank you Anh