Yes indeed it is working! There are many reasons you may see a 502 gateway error.
The most common reason is your web host may be blocking requests from our CDN thinking it is automated bot traffic.
Some shared web hosting providers have these kinds of protections in place so that they can fit more people on a shared platform by mitigating what it thinks is automated traffic.
The CDN “fetching” a static resource when a request comes in is quite normal for a CDN. A “502” (bad gateway) error means we tried to connect to your site via a CDN endpoint and your web host blocked the request.
You can try to reach out to your web host to turn that sort of setting off, or if they ask to whitelist IPs you can email us directly and we can provide a list of IPs to whitelist. I’d start with them first.
Hope that helps!