The reason is the access limitations on your S3 bucket. Try opening the SVG file in a new tab. You receive the following as a response:
This is not an SVG, and the web browser will not be able to render the content on the screen.
Grant the permissions (public in this case) to the S3 and your SVG should work just fine. https://docs.aws.amazon.com/AmazonS3/latest/userguide/example-walkthroughs-managing-access-example1.html