If all you get is a blank page and the url in the browser shows two sites redirecting back and forth when logging in like:

Redirect loop after logging in

Please clear your browser cache and cookies (specifically for vt.edu), this problem will go away and you should be able to use Ensemble. We are still trying to track down the root cause of the problem, but please note that clearing the browser cache and cookies will require you to login with 2-factor again.