A 530 error is a Cloudflare-specific error code for: "Cloudflare cannot reach the website because the origin DNS settings are incorrect or the account is suspended.".

How do I fix or troubleshoot a 530 Error?

Common steps include reloading the page in your browser, checking for typos in the URL, verifying server status, clearing browser cache or cookies, and contacting the website owner or server administrator if the error persists.

530 Error | Error-Message.Net

A 530 error is a Cloudflare status code that is accompanied by a secondary 1XXX error code (most commonly Error 1016: Origin DNS Error).

It indicates that Cloudflare received a request for a proxied domain, but is unable to route it to an origin server because DNS resolution for the origin server failed.

Determining why

The website’s CNAME record points to an external hostname that cannot be resolved in public DNS.
The domain or hosting account was suspended or deleted at the origin host.
DNS configuration changes made at your registrar broke origin connectivity.

Steps you could possibly take:

If you are a visitor:

The website owner needs to update their DNS records. Reloading will not resolve the issue.

If you are the website owner:

Check the secondary error code displayed on the error page (usually Error 1016).
Log into the Cloudflare dashboard and check your DNS records. Ensure your CNAME or A records point to active, resolvable hostnames.
Verify that your hosting account has not been suspended for non-payment or expired domain registration.

Source: Cloudflare Documentation - Troubleshooting Cloudflare 5XX errors (Error 530)