Error on loading .babylon file but everything works?

So what would cause this error:

babylon.js:16 BJS - [17:00:25]: Unable to load from ./Assets/scene.babylon: loadAssets of unknown
		Name: P_Light, type: Point
		Name: D_Light, type: Directional
		Name: S_Light, type: Spot
		Name: H_Light, type: Directional
		Name: Camera, type: UniversalCamera

When loading a .babylon file that has just a UniversalCamera, and the 4 lights its mentioning above in the error.

Everything works and all nodes come through fine. But this error drops everytime.

Hard to tell without the file or a PG, could you share it ?