Fix #2: Restart your PC. Restarting your PC is another good way to fix any Minecraft error code.

Error code CE-34878-0 in Minecraft can be caused by several different factors. The most common ones appear to be corrupt game files, incorrect files, or not updating your game.

Read on if you need some input on how to fix this problem with Minecraft Realms on your personal computer.

If you get Minecraft Exit code 1, The game has crashed, follow the solutions mentioned in this post to resolve the issue easily.