Error Page: "Sorry, an error occurred or this page isn't available." is visualized upon http response code of [400, 404, 429, 500] instead of blank pageSummaryBeginning in Orlando, the ServiceNow Platform will display an error page which will be shown below to replace the old "blank page" The page is displayed when the server responds to a browser client with an http response code of [400, 404, 429, 500] The messaging within this error page is as follow "Sorry, an error occurred or this page isn't available."