If you are still receiving CE-34878-0 errors after updating, try the following suggestions:

If a PS Camera is connected to the system, remove it and reboot the system, then turn off Enable Face Recognition.
From the PlayStation 4 home screen, select Settings.
Select User.
Select Login Settings.
Uncheck Enable Face Recognition.
If you have upgraded the Hard Disk Drive (HDD) in your console, please re-install the original HDD.
If the error occurs again, back up your saved data, and then:
From the PlayStation 4 home screen, select Settings.
Select Initialization.
Select Initialize PS4.
If the error continues and occurs with every application, or as soon as the application starts, please contact PlayStation Support for assistance.