Corrupt save file. It's mentioned in this thread: http://answers.ea.com/t5/Battlefield-4/Known-Battlefield-4-Issues-and-Next-Steps-Updated-Nov-14/m-p/1767613#M31115
"Single Player Save File Corrupted
INVESTIGATING
We are still investigating the issue of single player save files being corrupted for some players. If you have experienced this problem, please describe below the steps leading up to the save file being corrupted, your platform (PC, PS3 or X360), and when the issue occurred."
Some folks have reported success removing the save file and starting over and though it's not an optimal solution, it appears to allow you to play the game.
I have a $400 PS4 system and $120 ($60 game, $50 Premium, $10 PS4 Digital Upgrade) worth of game that I can't play because Error CE-34878-0.
Nice work.
I've been able to delete the file sometimes, but now it doesn't seem to work. I can't start the game, as soon as you press 'options' to load game whamo you're done Error CE-34878-0.
Something else I've tried is uploading a known good file to online storage, and then back once it corrupts between servers. This has worked sometimes but not every time, as just deleting the corrupt file from app data works sometimes.
I have the same problem, have you been able to play since this date.
