AMP Story being marked as noindex on Google AMP Validation, but there is no noindex tag inside the AMP Story

Question

I have an AMP story page that even if the AMP Validator passes it as valid, the Google AMP Test prompts me that it is invalid with a Indexing error that says URL marked 'noindex'.

Obviously i do not have any noindex meta on the content of the page and i do not know why the Google AMP Test does not validate the story.

Any clues would be appreciated!

AMP story page

AMP Validator Test

Google AMP Test

Answer 1

This is not caused by the contents of your page but rather the HTTP headers. The headers of this page are:

HTTP/1.1 200 OK =>
Date => Wed, 05 Feb 2020 16:39:25 GMT
Server => Apache
Cache-Control => max-age=0, must-revalidate, private
pragma => no-cache
expires => -1
X-Robots-Tag => noindex
Access-Control-Allow-Origin => *
Access-Control-Allow-Headers => authorization, origin, user-token, x-requested-with, content-type, Content-type
Access-Control-Allow-Methods => PUT, GET, POST, DELETE, OPTIONS
Connection => close
Content-Type => text/html; charset=UTF-8

The X-Robots-Tag => noindex causes Google's AMP Test service to not be able to fetch your page to evaluate whether it is valid. Removing this header should resolve the issue.