You have 4 sim days to find the Death Note, which should be more than enough time. If you added a shinigami to your household, your sim cannot interact with them until you pick it up. Once you find it, your sim can start their goal and do whatever they wish with the Death Note (according to their trait). The fact that The Sims - particularly Sims 4 - is one game that still allows cheat codes to be used freely is a delight to fans of the simulation game. We’ve searched the internet in hopes of bringing to you the most comprehensive list of Sims 4 cheats available.
Please let me know in the mod-has-bug section of my discord server Triplis Station.
If I can repeat the bug in my own game, I will probably be able to fix it. Sometimes patches break little bits here and there and it's difficult to track them all down on my own, so I appreciate any reports that catch this stuff.
When reporting a bug, please try to be as specific as possible (this helps me more easily hone in on the issue and repeat it in my own game). Example:
Vague: Lightning Rod doesn't work
Specific: When I use the Sorcerer spell Create Lightning Rod, the Sorcerer's animation plays and the targeted sim stops and waits, but they don't get shocked and die.
In the specific version, I now know that the reported issue is that the death isn't triggering, which means the custom death interaction is probably broken somehow. In the vague version, it could be any aspect of the spell that is broken and because I don't know which one, if I fail to repeat it in my own game, I have no idea how to begin to reason about what could have lead to the issue described, since I don't even know what exactly didn't work.