This error may occur if CausesValidation is set to true and databound controls (with custom validators based on the databound elements) have not yet been loaded. System.Web.HttpRequestValidationException (0x80004005): The URL contains characters that can be used for a cross-site scripting attack. at Wyndham.Ccfs.Web.Application.Utilities.Fusion.FusionUtilities.PreventInvalidCharsUrls() at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequest(HttpContext context) at Fusion.Web.Base.ToolKitPageBase`1.ProcessRequest(HttpContext _context)