It's frustrating that a product from a company like Siemens is having these kinds of issues. There's no way this would fly at an enterprise level, which is the quality they're supposed to bring to the table.
I had the exact same situation. The way I was able to add it to the ford pass app was to do the manual option. I'm sure you've tried that, but that's what worked for me. I just entered the appropriate name and password and I was off and running, even when I couldn't get the setup program to work.