My crawl failed
Reading the failure reason and what to do next.
Open Knowledge. If the latest read failed, the reason is under the progress bar.
Typical causes: the site was unreachable, the website address does not serve a public page, or your plan changed while the read was running. Fix the site, then Start crawl again.
Login-only pages and calendars that never end will yield thin answers. Add the important answers yourself, or publish a public FAQ page and recrawl.
Very large sites on a small plan hit page/time caps and look “done” without every URL. That is a plan limit, not necessarily a failure — upgrade or add key pages yourself.
You can add knowledge manually at any time; it does not depend on the crawler.