Why does Page Performance show a "404: Not Found" error message when I try to refresh a page's data? Last updated: June 6, 2016 Available For: Product: HubSpot Marketing Subscription: Basic, Professional, & Enterprise When attempting to refresh page data or check a page for SEO errors in Page Performance, the following error may appear, indicating that there was a problem retrieving the data for your page: This error appears when the Page Performance crawler is unable to find a live version of your page, meaning it was likely deleted or its URL was changed. Page Performance considers a page unique based on its URL. If a page is deleted or the URL is changed without a redirect, the tool will no longer be able to collect data for that page. Related articles: How do I refresh the data in Page Performance? Why does Page Performance show a "302: Object Moved" error message when I try to refresh a page's data? Why does Page Performance show a "301: Moved Permanently" error message when I try to refresh a page's data?