I've had issues with the Roku app on my fire stick for the last couple of days. Internet is good and I have no problems using other apps. I've restarted my fire stick several times, deleted cache and data, restarted the app, and deleted the app and re-installed a few times. The app will open and let me choose a title, but then the screen turns black and just keeps loading. I've even switched out my fire stick with no luck. Any ideas?