I think most of this resides in a bug that is working on being fixed. It has to do with a missing texture in most cases. In my scenes in its usually caused by a missing material. V-Ray will look for something that’s not there. Try adding the name of the material (open V-Ray Debug wintow to see what material its looking for, usually something like this: “In __handleReferencedPlugin for Unknown param asset::Unknown param plugin, could not find asset with url /glass_basic”) The bold underlined bit is the missing texture. Go ahead and recreate that texture, and it should render.