Question help with dealership

[JustKaym]

I'm trying to put some addon vehicles in my dealer, I have them in my vehicles.lua in the qbx_core folder, they are in the dealership list of cars, i can change the car in the dealer preview but then i cannot see the window to buy the car

I'm unable to see this window bellow

I can even see them in the admin car spawn function:

Also de admincar command shows this: