The site is not up

The host is completely correct and it was working before Cloudflare
DNS are also set correctly
But the site does not come up, what is the problem?

May I ask which error do you get? :thinking:
Could you share a screenshot of this error?
May I ask you to post and share your domain name in bracketed dot [.] notation here with us so we could double-check, troubleshoot and provide some feedback information? :thinking: