How to fix Material on objects

Hello,

I’m a

beginner in Unreal Engine 4 and I’m mainly using it for level design. My problem is that when I import pack in Unreal, I put an object on the scene (even before that, when I click on the object) object loose material, same goes with materials too. In this question I’m gonna put screenshots about my issue, I hope that someone can help me with that, cause I tried to look on YouTube but nothing.

Regards,

Ivan D.