@Wishonmeh05 Ok, so I went and hunted it down and took a look at the DATA file for the trait before being opened in sims studio. Had a hunch sims studio may have read it wonky. I think DATA files that were generated by a special program, like one of Zerbu's earlier tools, may have issues with reading properly in sims studio. They can be read properly with velocitygrass's data tool, but his tool won't read the new ui_category part and he's awol, so.... :/
It gets complicated fast.
So anyway, you'll need to manually add back in the display_name, which is missing from the Sim Data in the version you posted. Which is 0x554F53CB
And you'll need to add in ages code, which also got neutered when read by sims studio. Looks like the creator was just doing all ages, so that'd be the following in the sim data:
8
32
1
4
2
64
16
Replacing:
And in the Trait Tuning, you'll want to change UNUSED_FLAG to TODDLER
Unless you don't want toddlers to be able to have the trait, in which case, delete that part. And in the ages Sim Data, delete
4