Blender Send to UE plugin - meshes missing 2nd Lightmap UV

Development Rendering
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1

Using the new Send to Unreal plugin in Blender to automatically send meshes inot UE4.
Works great but after baking with Static Lights my meshes are always black.
After some searching I discovered the error is most likely my meshes are missing the 2nd UV index for Lightmaps.
In the Mesh Editor the Light Map Coordinate Index is stuck at 0 and cannot be changed to 1!

I’m no Blender guru. Is anyone else using this workflow and can suggest the easiest solution for Blender to automatically create the 2nd Lightmap UV on export?

2

If this plugin make it with obj format for model, then the problem is the format itself. Obj format doesnt allow you to have partial or several UV layers.