How do I redirect a naked (apex) domain to www using Route 53?
I just managed to figure this out yesterday:
Go to your S3 console at https://console.aws.amazon.com/s3/home and click Create bucket. For Bucket name enter in your naked domain name, e.g. for www.example.com, you would put just example.com. Then click Create.
Click on the name of the new bucket, then click Properties > Static website hosting. On the menu that appears select Redirect requests. For Target bucket or domain enter in the full domain, such as www.example.com. For Protocol put in the desired protocol, http or https. Click Save.
Open your Route 53 hosted zone by navigating to https://console.aws.amazon.com/route53/home and clicking Hosted zones in the menu to the left. Select your domain and click on Create Record Set. Leave the Name area blank, and leave the default type at A - IPv4 address. Select Yes for Alias, and click on the Alias Target textbox. You may have to wait a few moments for the values in the dropdown menu that appears to populate. At this point the menu should contain the S3 Website Endpoint you created in steps 1 and 2. Select it.
Lastly, click Create, and enjoy your new routing set-up!
Try making an alias record instead of CNAME.
Per this answer: RRSet of type CNAME with DNS name foo.com. is not permitted at apex in zone bar.com