Error in module "System.Web"
  Cannot find ContentPlaceHolder 'Sidebar1ContentPlaceHolder' in the master page 'senate_1col.master', verify content control's ContentPlaceHolderID attribute in the content page.
  System.Web.UI.MasterPage CreateMaster(System.Web.UI.TemplateControl, System.Web.HttpContext, System.Web.VirtualPath, System.Collections.IDictionary)
An error occured at
  • System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection)
  • System.Web.UI.Page.get_Master()
  • AX.Starter.Main.Page_PreInit(Object sender, EventArgs e)
  • System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
  • System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
  • System.Web.UI.Page.OnPreInit(EventArgs e)
  • System.Web.UI.Page.PerformPreInit()
  • System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
    •