Now when you go into Google Search Console and click on some of the coverage reports, the “validate fix” button should be back. Google disabled it while upgrading the classification system.

Here is the validate fix button in Google Search Console for page indexing issues: Here is the email you get after you click it: Now, with 404 pages, I do not expect these to be marked as fixed.

Google is updating something in Search Console and for now, you can't issue new validation requests. Google Search Console has temporarily disabled the validate fix button on its coverage report ...