I cannot tell you where you went wrong, I cannot even tell you where I went wrong, but it happened. Thrice. I thought I had followed everything so closely, even went back through step-by-step and couldn’t find out what went wrong.
I started this tutorial from scratch 4 different times (almost a year apart), fourth times the charm. It works well. All I can tell you is to make absolutely sure you’re setting up everything, pictures and documentation.