[Pasha Paterson]

Saagar, make sure you have the ks_ferrari_488_gt3 car from the "Red Pack" DLC installed.
When you execute the script that comes with the mod, watch the window where the script is executing, and see if you can catch sight of any errors that might be occurring.

[Saagar Bakshi]

Do you have the Red Pack DLC? Without it, the car won't work.

I do already have the Red Pack, double checked everything looks to be installed.

AHHHHHHHH the script window thinks I DON'T have it....hold on.

OK, so that was it. I literally had it in the "content" folder not the "cars" folder. Thank you everybody!