title: Sys.WebForms.PageRequestManagerParserErrorException: Error parsing near '<HTML dir="ltr">
body: <p>I have aspx in sharePoint _layout folder. This page loads user controls from controltemplates folder. User controls has ajax update panels.</p>
  
  <p>I am getting below error when I working with page. </p>
  
  <pre><code>Message: Sys.WebForms.PageRequestManagerParserErrorException: The message received
  from the server could not be parsed. Common causes for this error are when the response
  is modified by calls to Response.Write(), response filters, HttpModules, or server
   trace
       is enabled.
          Details: Error parsing near '&lt;HTML dir="ltr"&gt;
          &lt;H'.
          Line: 4723
          Char: 21
          Code: 0
          URI: http://mysitename.com/ScriptResource.axd?d=5kqA7Nw-EeaK3p4QkMYAWi......
  </code></pre>
  
  <p>Please advise me to resolve this</p>