Android.process.acore has stop and setting has stop too..please help..what can I do to fix this?

[AC Question]

android.process.acore has stop and setting has stop too...please help...

My phone is OPPO R827,
I've try to fix the android.process.acore but my setting is stop too...
What can i do to fix this?
Please help me...

*sorry my english is bad*

 

[N4Newbie]

Maybe this will help?

WARNING: He says in the video's remarks that your contacts may be deleted if you try this, so make sure they are backed up first!