9652 15:41:52 ERROR Failed to render rendering
Exception: System.InvalidOperationException
Message: Error while rendering view: '/sitecore/shell/client/Speak/Layouts/Renderings/Common/PageCodes/PageCode.cshtml' (model: 'Sitecore.Mvc.Presentation.RenderingModel, Sitecore.Mvc').

Source: Sitecore.Mvc
   at Sitecore.Mvc.Presentation.ViewRenderer.Render(TextWriter writer)
   at Sitecore.Mvc.Pipelines.Response.RenderRendering.ExecuteRenderer.Render(Renderer renderer, TextWriter writer, RenderRenderingArgs args)

Nested Exception

Exception: System.Web.HttpException
Message: Cannot redirect after HTTP headers have been sent.
Source: System.Web
   at System.Web.HttpResponse.Redirect(String url, Boolean endResponse, Boolean permanent)
   at Sitecore.Shell.Web.ShellPage.GotoLoginPage(HttpContext httpContext, Boolean returnAfterLogin)
   at Sitecore.Shell.Web.ShellPage.IsLoggedIn(Boolean returnAfterLogin)
   at Sitecore.LaunchPad.LaunchPad.Initialize()
   at ASP._sitecore_shell_client_Speak_Layouts_Renderings_Common_PageCodes_PageCode_cshtml.Execute()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData)
   at Sitecore.Mvc.Presentation.ViewRenderer.Render(TextWriter writer)