It's disappointing to hear that the App is not working properly for you. =(
It is strange that it doesn't allow you to view your bill but it works when you download the bill and then view it. Since it is happening across multiple platforms, it is most likely related to an issue with your MyRogers profile.
We'll need to pull up your information to investigate this further for you. As per the directions in Post 99 of this thread. Please send us a Private Message so we can get started on this for you.
We look forward to assisting you via the CommunityHelps Inbox.