New Post: Back Office Settings are Blank in DNN 7.2.2

Happened to me also with DNN 7.3.1 and NB Store 2.4.0. Seemed like it was okay until I created the Store and Checkout pages - I was able to see settings when initially poking around the Back Office. After creating those two pages and adding requisite modules, I went back to Back Office and got blank pages.

Recycled the application pool and now it's working fine again.