I had the same problem after installing PR 1.2. I forgot the exact reason why it happened but you need to reflash your phone through NSU or winflasher and then reinstall the application. My Suggestion would be to read the thread with application.

Oh I remembered, the reason why it happened was because the application was only compatible with PR 1.1 and not PR 1.2. The latest version 7.2 is compatible with ONLY PR 1.2 so make sure you have that, and there should be no problem