Server Error in '/' Application.

Value cannot be null.
Parameter name: url

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: url

Source Error:


Line 15:             Session("idioma") = "aleman"
Line 16:         End If
Line 17:         Response.Redirect(Page.Request.ServerVariables("HTTP_REFERER"))
Line 18: %></script>
Line 19: 

Source File: C:\home\site\wwwroot\About.aspx    Line: 17

Stack Trace:


[ArgumentNullException: Value cannot be null.
Parameter name: url]
   System.Web.HttpResponse.Redirect(String url, Boolean endResponse, Boolean permanent) +11740078
   ASP.about_aspx.__RenderFeaturedContent(HtmlTextWriter __w, Control parameterContainer) in C:\home\site\wwwroot\About.aspx:17
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +276
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +80
   ASP.site_master.__Render__control9(HtmlTextWriter __w, Control parameterContainer) in C:\home\site\wwwroot\Site.Master:65
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +276
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +11662239
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +47
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +80
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +53
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +169
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +80
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +169
   System.Web.UI.Page.Render(HtmlTextWriter writer) +40
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +80
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4239


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0