Cloudflared 1.1.1.1 - SSL issue

Hi there,

I’m running Cloudflared on Windows, and my configuration file is as follows:

Cloudflared.yaml

proxy-dns-address: ::1
proxy-dns-address: 0.0.0.0
proxy-dns: true

I’m getting these errors:
[9473] failed to connect to an HTTPS backend “https://Cloudflare-dns.com/dns-query” error=“returned status code 504
[9615] failed to connect to an HTTPS backend “https://Cloudflare-dns.com/dns-query” error=“returned status code 504

Any idea why this is the case? A server backend issue?