How to fix a 404 page that don't show up as a boken link in broken link checker?

Hi guys,i start to build my WordPress site, but I got a 404 not found page on my about us page,I tried to fix using a link broken checker plugin, but don’t show up there as a link broken. what should I do?

Welcome to the forums, @albert1973.

Do you mean that when you click a link on your site to visit the “about us” page, you just see a 404 error? What happens if you enter the URL directly in your browser?

Delete current about page and try recreating the page again.