I just got Error Code 34 as well. I couldn’t save or upload my build to my library. It allowed me to upload my Sim to the library but it then showed it as corrupted. I’m on Xbox, all packs & kits owned and installed
I exited the game, restarted my Xbox and after loading the game back up, it asked me if I wanted to sync from Xbox storage or cloud. I chose cloud and when it loaded, my entire save file that I had been playing in had vanished.
This is the first time I have experienced this. I was playing in a new household I had downloaded from the gallery doing a fresh challenge I had set myself. I saw online that taking lots of photos can cause it and I was queuing up photos to be taken a lot during my session this evening.
I hadn’t saved for approx 4 hours when I went to go save and bug occurred.
I have tried starting a new game and loading up an old save and it appears to be working okies since restart, just missing my game file.
I had been playing in Del Sol Valley and using the cheapest camera. I had changed my lot traits and challenges frequently throughout the game session.