PreBid AMP Header Bidding Implementation - Cross Origin Frame Issue

Question

I'm tryng to use PreBid on AMP pages, but I'm getting a cross-origin frame issue with my remote.html file:

I hosted my remote.html file with Amazon S3 and updated the CORS configuration to allow my domain. but I'm still getting the following error in my browser.

Blocked a frame with origin "https://s3.amazonaws.com" from accessing a cross-origin frame. Error: Blocked a frame with origin "https://s3.amazonaws.com" from accessing a cross-origin frame.
at Zc (https://3p.ampproject.net/1504040004635/f.js:82:23)
at HTMLIFrameElement.<anonymous> 
(https://3p.ampproject.net/1504040004635/f.js:81:346)

My CORS Configuration file for my S3 bucket is as below:

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<CORSRule>
<AllowedOrigin>https://3p.ampproject.net</AllowedOrigin>
<AllowedMethod>PUT</AllowedMethod>
<AllowedMethod>POST</AllowedMethod>
<AllowedMethod>DELETE</AllowedMethod>
<MaxAgeSeconds>3000</MaxAgeSeconds>
<AllowedHeader>Authorization</AllowedHeader>
</CORSRule>
<CORSRule>
<AllowedOrigin><http://my_domain_name.com></AllowedOrigin>
<AllowedMethod>PUT</AllowedMethod>
<AllowedMethod>POST</AllowedMethod>
<AllowedMethod>DELETE</AllowedMethod>
<MaxAgeSeconds>3000</MaxAgeSeconds>
<AllowedHeader>Authorization</AllowedHeader>
</CORSRule>
<CORSRule>
<AllowedOrigin>*</AllowedOrigin>
<AllowedMethod>GET</AllowedMethod>
</CORSRule>
</CORSConfiguration>

Any idea on how I might resolve this issue?

thanks in advance.