I get this error when I submit the default dnn site map
Sys.Webforms.PageRequestManagerParserException: The message received from the server could not be parsed. Common causes for this error is when the response is modified by calls to Response.Write(), response filters, http modules, or server trace is enabled. Details: Error parsing near '<script> window.open('
I have not installed any custom http compression modules, or enabled server tracing
Any help appreciated thx