Whenever I’ve gotten the blank white screen it is because of a dependency link is broken or I’m using some part of ionic/angular that I didn’t import into my service or controller. For example, using $stateParams without defining it in the controller definition.
If I were you I would look at console logs and look for a stack trace or something that hints at something going wrong during booting of your app.
Like I said, I’ve encountered this multiple times and its always been something like a compiler error or a broken reference.