[OPEN] [IL] LastException when interacting with dolphin once

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.108.349.1020-1.300.000.189 DX11
What expansions, game packs, and stuff packs do you have installed? Seasons Island Living Home Chef Hustle Holiday Celebration Get to Work Eco Lifestyle Cool Kitchen Crystal Creations
Steps: How can we find the bug ourselves? 1. Make a mermaid in CAS 2. Interact with the dolphin 3. Feed the dophin
What happens when the bug occurs? The dolphin disappears after having received the fish.
What do you expect to see? no idea, since I have only been playing the sims for a week or so and I don't know any better than this happens.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

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Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.108.349.1020-1.300.000.189 DX11
What expansions, game packs, and stuff packs do you have installed? Seasons Island Living Home Chef Hustle Holiday Celebration Get to Work Eco Lifestyle Cool Kitchen Crystal Creations
Steps: How can we find the bug ourselves? 1. Make a mermaid in CAS 2. Interact with the dolphin 3. Feed the dophin
What happens when the bug occurs? The dolphin disappears after having received the fish.
What do you expect to see? no idea, since I have only been playing the sims for a week or so and I don't know any better than this happens.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

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Hey,

I had to install a mod to actually see the error message. With thanks to TwistedMexi for the Better Exceptions mod (together with the MCCC mod the only mods that I had installed the last time I tested this issue).

The first few times I tested this issue I had no mods installed. Both with feeding and trying to get the dolphin to fetch the dolphin would simply disappear. I would hear the squeaking of the dolphin, but the dolphin itself wasn't visible anymore. The system did recognize that apparently something needed to happen, because I couldn't call a dolphin because there was already a dolphin (game message).

Once I installed MCCC and Better Exceptions, I finally got a pop-up stating there was an error and more insight with the report:

Category ID: relationship_service.py:1201

I had experienced this issue before with a heavily modded installation, so at first I thought it was something with the mods. I just wanted to make sure it was one of the mods, so I decided to make a clean, vanilla, installation and ONLY install MCCC and Better Exceptions to get a full report if something were to happen.

So, it's a clean installation, with a new world, new sim and everything.

The sim is a "natural" mermaid from CAS, so no sim who turned into a mermaid with Kelp.

I also had this issue when I only had Get to Work, Island Living and the Holiday pack and I remember I also had a similar result with letting the dolpin fetch something. I wouldn't get anything in my inventory and the dolphin would simply disappear.

I don't know if it makes a difference but my Windows 11 laptop runs DX12, so the Sims has the -DX11 added, per the instructions from EA in the forums somewhere here (don't have the exact address at hand right now)

Just in case you need a save file: I currently have 6 save files of this vanilla game. Do you only need the last one or do you need all of them? I've barely played, it was simply for testing the dolphin interaction.