Error in handler PHP

PHP WARNING: 2013-02-10 17:09:36 (MSK): "SimpleXMLElement::__construct() [<a href='simplexmlelement.--construct'>simplexmlelement.--construct</a>]: &lt;?xml version=&quot;1.2&quot; encoding=&quot;UTF-8&quot;?&gt;" in file /home/wizar621/public_html/vk/engine/classes/ElggXMLElement.php (line 23) What do ?