Help with adding Non-Els car to FiveM test server think resources might be messed up

I don’t know what im doing wrong i’ve watched over like 20 vids over how to add a non els car to my FiveM test server but it just says invalid model when i try to spawn it and then when i go to ->vMenu-> addons for cars->Unavailable, it just says this under my car that’s in addons “make sure the owner is streaming it correctly”