HttpWebRequest to avito.ru -> error

Need to get HTML from any add out of these: https://www.avito.ru/moskva/kvartiry?user=1

I have the following code:

HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(url);
        Request.ProtocolVersion = HttpVersion.Version11;
        Request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36";
        Request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*;q=0.8";
        Request.Headers.Add(HttpRequestHeader.AcceptLanguage, "ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4");
        Request.Method = "GET";
        Request.Timeout = 10000;
        using (HttpWebResponse Response = (HttpWebResponse)Request.GetResponse()) { ...;}

It used to work just fine untill today. Apparently they have changed something at their web-site and now the last line of the code throw an error, which says:

System.Net.WebException: Base connection is closed: inexpected error at transfer. ---> System.IO.IOException: connection error because of inexpected packet format.

The thing is, I still have good response from the link at the top.

But it throws an exception at response from something like https://www.avito.ru/moskva/kvartiry/2-k_kvartira_54_m_1617_et._555913941

browser requests are responded as they should. Even with disabled cookies and JS.

Any Ideas?

ps. error message can be inexact as it's translated. My excuses for grammar..

Solution

The server droped my requests because I forgot to add "www." to the domain-name for composed url's.. Guys, keep an eye on details.