Hi John, you are getting a 403 error (forbidden) from CouldFront when you are trying to load the bin file. This is a generic error. One reason AWS responds with 403 is when an application tries to access a file that is not in the S3 bucket.
In this example, your file names have an inconsistent case. Your puzzles are trying to find a bin file with a lower case “c”, but your bin file has an uppercase “C”. The S3 file system is case sensitive. Macs and PC are more lenient about case. This is why it works locally for you and not in the cloud.
When dealing with file system naming, the best practice is to use lower case ascii and underscores (e.g. my_file.bin). This represents the lowest common denominator between different OSs and file systems.