On PlayStation systems, the CE-34878-0 error message indicates a crash in the game. Though mainly happening on the PlayStation 4 than on the newer successor, the PS5, restarting the game is usually the solution to this problem. In addition, you can power cycle your system to see if that helps.If you're still getting CE-34878-0 errors, though, it might be time to update your PlayStation and the game you're playing.