Page downloading on load AWS S3

This is the first time I am hosting a Kirby site with AWS, I have over 100 websites on here so it is not a practice I am not used to using. I am setting up a website for static web hosting with AWS S3 buckets. I have set the index to index.php which is in the root, the same as I have done locally with XAMPP where I have no issues. Why is the page downloading on load and not displaying my website?

http://testmangomedia.s3-website-eu-west-1.amazonaws.com

According to the AWS docs, you can only host static websites on S3 buckets. No PHP etc.

Ahh, thanks boss, I actually got in touch with the support and they gave me some really long winded answer which didn’t help at all. To the point and exact thanks for the answer.