Hello!
The warnings you have highlighted bellow for the worklight01 - worklight04 are nothing to be concerned about. This warning is basically stating that the light node for those lights is not present at the time the vehicle is spawned.
Basically in the configurations when you choose your different light options, to prevent the vehicle from stuff projecting light from a light that is not there (not selected) we hide the light node with the rendered object as well. For some reason the game reads this as an error and throw that warning, but it is nothing to be concerned with as it has no effect on the overall vehicle or performance of your game!