Well I have same problem since I have upgraded my Negux 5X to Android 7.0. Facebook App is crashing constantly, I tried Clearing Cache & Data but that only helps temporarily. I tried uninstalling, reinstalling, all that stuff, it's been 2 months like this now. Am I the only person who got this problem? Is there something wrong with my phone? All other apps are working without any problems. I mean it crashes on everything, I open an Instant Article = Crash, I open Nearby Friends = Crash, I open App Settings = Crash. But after I restart the app like 10 times, it starts working normally. I think they didin't add support for Android 7.0 yet, but then again, I don't see many people having this problem, so I wonder what is going on here. I am alone?