Unfortunately, Settings has stopped.
I've been having this problem for the past day or so in my Nexus 4, running on KitKat.
I have a "Data usage warning" notification. When I tap on it and am sent to Settings > Data usage, the application simply stops. The same thing occurs if I access manually from the settings menu.
I've tried rebooting in Safe Mode but the problem persists, so I'm certain that it's not a third party app.
I'd appreciate any sort of insight on this issue.
Re: Unfortunately, Settings has stopped.
Welcome to Android Central! Have you also tried a system cache partition wipe? Reset: Google Nexus 4 | T-Mobile Support