I recently visited your domain name and see it’s working fine.

Could you confirm it’s resolved?

Nevertheless, I see mixed nameservers returned for your domain name.

Was it recently added to Cloudflare or did you recently changed your domain nameservers back to old nameservers instead of using Cloudflare nameservers?

Maybe it’s due to the regular DNS propagation process, which could take up to 24 hours or even sometimes longer due to the local ISP cache at their DNS servers.

Kindly, wait a bit longer, try to flush your DNS cache at your device, or try using a different Web browser, or even try accessing by your mobile phone via mobile data (4G LTE, cellular), or at least using a VPN connection (if possible) to re-check.

Regarding above stated error, kindly may I suggest looking into below article for more information about why this error happens and how to trobleshoot: