There are two issues remaining:
I created the realm with a new world that I named "The Quiet Place". It was never named "My World". When you get to the screen, there are no worlds named, "The Quiet Place."
I'm interested in editing the dominant world. If I wanted to edit another world, I'd make it the dominant world. This "choose your world" should be a dropdown or search box option instead of this main area. It is extremely confusing. It didn't used to be like this, and was much more clear.
One of the "My Worlds" was "The Quiet Place", which I was trying to get back. Clicking on the next "Edit World" did allow me to download it, too. Thank you for the insight... I thought I was already in the Edit screen.
I experienced the same error. I've reinstalled minecraft, the natural texture pack, tried Purebdcraft pack, still cannot get into Minecraft. No crafting happening. Lots of sadness.