Error parsing KinoPoisk rating, why?

Question

PHP

Good afternoon!
I ran into a problem when parsing a rating from KinoPoisk.

The code I am using:

$doc = new DOMDocument();
        $doc->load("http://www.kinopoisk.ru/rating/".$movie['kp_id'].".xml");
        $kp = $doc->getElementsByTagName('kp_rating');
        $kino_rating = $kp->item(0)->nodeValue;
        $kino_votes = ($kino_rating) ? $kp->item(0)->getAttribute('num_vote') : "";
        $kino_votes = number_format($kino_votes);

In the $movie["kp_id"] array - the movie ID.

Parsing is fine, but sometimes this error occurs:

Warning: DOMDocument::load(): Start tag expected, '<' not found in www.kinopoisk.ru/rating/840817.xml, line: 1 in