While playing music today (through the music app), my 7+ on 10.3 crashed. When it came back, I entered my pin, and ended up with this:
That's it. Nothing else on my phone, not even the stock apps (including the Settings app). I have a current backup, so restoring, while a pain, isn't an issue. But what would cause that?

That's it. Nothing else on my phone, not even the stock apps (including the Settings app). I have a current backup, so restoring, while a pain, isn't an issue. But what would cause that?