Never mind the question I asked.
I can see you're using S3, and that's good, and that you've set it up to
access it as a website.
A lot of stuff is working. It looks like the software is making a mistake.
I'm going to run through the process myself, step by step, and probably do
some rewriting of the tutorial. This is an area where it is quite weak.
So give me a little time, and we'll get this fixed.
BTW, my maternal grandmother was from Hamburg. :-)