Report Viewer Configuration error - In View Source of webpage

Question

I found the following error message when I checked View source of the web page , but the web page works just fine. Our Test lead found the error while performing Assertion t

Answer 1

After changing the web.config file depending on IIS version, try add this code part:

  if(!IsPostBack){
        // Here codes about ReportViewer1 
    }

You can check this similar problem.