S3 Bucket Not Found

Have you deleted the bucket recently? Amazon S3 is built on eventual consistency model, it can take some time for changes to propagate across all AWS Regions. This is why you might temporarily see your bucket in the console, or in a response to a ListBuckets API request, even after you delete the bucket. Until the bucket is completely removed by Amazon S3, you might still see the bucket, but you can't perform any other actions on the bucket.

https://docs.aws.amazon.com/AmazonS3/latest/userguide/delete-bucket.html