Also, please note that it can take up to 72 hours for your website to show that error on your side as well, and on this article there are also some workarounds to get your website to show that error on your side as well:
I suggest clearing your browser cache and DNS cache first, then if it doesn’t work change DNS servers to something faster, like 1.1.1.1 or Google Public DNS, on your computer, and if it still doesn’t work wait some time (for me DNS propagates in an hour or so but it depends).