Amazon CloudFront websites are blocking feed generation

Some websites use a service called Amazon CloudFront that can be set up in a way that blocks access to their content. When that happens, feeds can't be generated or updated for those sites.

Amazon CloudFront is used by website owners to help manage their traffic and keep their site secure. But some of its security settings treat feed readers and feed-generation services like Open RSS as unwanted visitors and cut off access to the page content needed to build a feed.