x-cache error from cloudfront

CloudFront’s Custom Error Page only performs a redirection and has no side effects whatsoever. Confirmed by an AWS engineer. So even if x-cache: error from cloudfront shows up in the response header, there’s no need to be too alarmed as long as it’s the intended behavior.

https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/GeneratingCustomErrorResponses.html

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