Hi @Kalisto01, can you share with us how old is the current save you’re playing in, and can you give us an estimate on how much you’ve built so far?
If possible, could you try to backup your singleplayer save to a pen drive and clearing up your save and profile, then starting a new game to see if the issues persist?
If not, we advise that you to reduce the number of light sources, NPCs and even building pieces, if possible, as the crashes are in many cases caused by high amounts of placeables in the same area, since the single-player client is unable to handle the same load as the online client, especially on console.
Additionally, please make sure to send the crash reports through the PS dashboard when this issue happens so our team can get a hold of them and look into the cause.