Problem with the mermaids tail

Well, I was playing normally with a ocult mermaid sim when I noticed that her tail was not showing when she was in the bathtub and later in pools and oceans. I went to CAS and she was invisible from the waist down as shown in the images. The swimming animation is invisible and I can no longer see her tail while swimming or in any other activity that involves her transformation as a mermaid. It's strange because until yesterday (06/29) it was normal. I've already restarted the save and even changed the character to another mermaid and it's still the same.