Addon cars don't work in game

Your resource Lua file is slightly wrong from what I can initially see

Replace ur current files{} section of the resource Lua with the one below:

files {
‘vehicles.meta’,
‘carvariations.meta’,
‘carcols.meta’,
‘handling.meta’,
‘vehiclelayouts.meta’,
}

(Yes I know Resource.lua is deprecated, but its easier to do it this way than redo it completely)

Refer to this