{"status":2,"errorCode":"UNKNOWN","data":{"details":"System.NullReferenceException: Object reference not set to an instance of an object.\r\n   at ASP._Page_Views_ShoppingCart_Partial_QuantityDiscountsWindow_cshtml.Execute()\r\n   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()\r\n   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()\r\n   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)\r\n   at adigitalbook.html5.mainserver.Models.AppController.RenderViewToString(ControllerContext context, String viewName, Object viewData) in D:\\tfs\\vsts-agent-2\\_work\\136\\s\\adigitalbook\\html5\\adigitalbook.html5.mainserver\\Models\\AppController.cs:line 99\r\n   at ADIGITALBOOK_HTML5_INIT.Controllers.ShoppingCartController.GetQuantityDiscountsWindow(QuantityDiscountsModel model) in D:\\tfs\\vsts-agent-2\\_work\\136\\s\\adigitalbook\\html5\\adigitalbook.html5.mainserver\\Controllers\\ShoppingCartController.cs:line 125"}}