why the display turns black when importing a datasmith file?

Every time I import a Datasmith file exported from 3Dsmax the unreal engine display turns black as if there is no light even I import only a box from 3Dsmax and also no materials are imported. What should I do ?

I think this is because there is no material

https://unrealstudiohelp.epicgames.com/s/article/Why-does-my-model-appear-black?language=en_US

For future reference, please use the linked support site for any issues or questions related specifically to Datasmith.

Cheers