Cloudflare 500 error

Cloudflare has noted that this is resolved now: https://www.cloudflarestatus.com/incidents/vqq87ynv47rg

If you do notice any other issues, please contact our support team.

We are continuing to monitor the situation and will provide further updates as they become available from Cloudflare.

If you are still experiencing issues, please try setting the Proxy status in your Cloudflare dashboard to "DNS only" instead of "Proxied", as that should resolve the error until Cloudflare resolves the issue.

Cloudflare is still working on a permanent resolution: https://www.cloudflarestatus.com/incidents/vqq87ynv47rg

If you are still experiencing issues, please try setting the Proxy status in your Cloudflare dashboard to "DNS only" instead of "Proxied", as that should resolve the error until Cloudflare resolves the issue.

Update: Disabling the proxy settings in your personal Cloudflare DNS account, should help bring website up, until Cloudflare resolves the issue. https://www.cloudflarestatus.com/incidents/vqq87ynv47rg

There have been reports of 500 Cloudflare error, on websites using their own personal Cloudlare account and using APO service.
Cloudflare has identified the issue: https://www.cloudflarestatus.com/incidents/vqq87ynv47rg and they are working on a fix.