Testing the Installer a bit more and I realize this is currently tech preview but when one (or more) components fail, there is no next step for users. There is no cancel or quit button to exit the failed install, nor is there a retry for the failed component, nor any error message at all. As a user, I'd be confused about what I should do next at this stage. I think this might be worth looking into with UX for the 9.1 GA++ release.