Let's say you go to or submit a GET request to http://my-s3-bucket.s3-website.us-east-1.amazonaws.com/index.html and something like this is being returned.

404 Not Found
Code: NoSuchWebsiteConfiguration
Message: The specified bucket does not have a website configuration
BucketName: my-bucket-ipknvspxzn
RequestId: 3Z0M65N0SVANP887
HostId: WopIPQD2sFhCVF/SHaABCquaH6WjoQveoapHZ0u2348ggt9edWurcv/M9m9bbxV7/uFAIh/Orxx=

This means your S3 Bucket is being used as a static website. The most common thing that will cause "The specified bucket does not have a website configuration" to be returned is that you have not enabled static website hosting for the S3 Bucket. 

1. Go to https://console.aws.amazon.com/s3/.
2. Select your S3 Bucket.
3. Select the Properties tab.
4. Scroll to the bottom of the page and ensure Static website hosting is enabled.