android.process.acore has stopped unexpectedly

[HennaServices]

I downloaded an app to clean up unwanted apps & data from the storage & accidentally deleted something I should not have.
Now I keep getting message "android.process.acore has stopped unexpectedly"
Please help me resolving this issue. I have already tried factory setting & async the contacts but nothing worked so far.

Regards,
Zainab
www.hennaservices.com

 

[HennaServices]

Also reboot with firmware update but didn't helped either.

 

[uzomaogu180]

My android has stop working .i cannot open my contact and youtube

 

[uzomaogu180]

I can not open my contact.when i try to open my contact my phone will display that android has stop working.and my youtub can not open