Problem with Guzzle library why is it giving 500 error because of subdomain?

Question

PHP

The code does not work, Page is not available HTTP ERROR 500
If you reduce the nested subdomain, let's say to level 3, there is no error, can it be fixed somehow?

require_once 'vendor/autoload.php';
$client = new \GuzzleHttp\Client();
//$url = 'http://companysub.dev.public.myapi.com';
$url = 'http://avtolavka.net.public.api.abcp.ru';

$res = $client->request('GET',$url);
echo $res->getStatusCode();
// 200
echo $res->getHeaderLine('content-type');
// 'application/json; charset=utf8'
echo $res->getBody();
// '{"id": 1420053, "name": "guzzle", ...}'