I've noticed issues in the latest version of Dreamweaver that seem to be caused by our interfaces moving too quickly and CC 2017 can't keep up. I think it does a lot more processing as a page is created with the code coloring and dependent files and live editing and everything else they have added recently.
What view are you on when you run the interface? Can you try again in "code" view? (just go to Menu->Code before running the wizard). I'd be interested to know if this makes a difference. We could probably add code to automatically switch to code view temporarily as the wizard runs if that does help.
If not, I can't seem to reproduce the problem on my end, but I'd be glad to investigate it further with you. I'd need a US phone number or Skype contact information and I could set up a screen sharing session in order to debug it on your machine directly with you.