syntax error, unexpected T_STRING

I wanted activate Photo Gallery plugin in WordPress, but there was an error:

Parse error: syntax error, unexpected T_STRING in /web/htdocs2/somewhere/home/www/wp_gallery/wp-content/plugins/photo-gallery/framework/WDWSitemap.php on line 34

public function add_wpseo_xml_sitemap_images( $images, $post_id ) {
$this->images = $images;

$post = get_post($post_id);

remove_all_shortcodes();
if ( defined('ELEMENTOR_VERSION') ) {
  \Elementor\Plugin::instance()->frontend->get_builder_content($post->ID);
}
add_shortcode('Best_Wordpress_Gallery', array($this, 'shortcode'));
do_shortcode($post->post_content);

return $this->images;
}

line 34 is: \Elementor\Plugin::instance()->frontend->get_builder_content($post->ID);