How to fix an interchange import error for a 3D asset

Hello, I am new to Unreal and I was following this tutorial to make a 3D environment https://www.youtube.com/watch?v=8-g69xKEhoE. At some point he wants us to download and import the following asset Jvari Monastery - Download Free 3D model by Nik (@nikska) [9b70c34] - Sketchfab.

However, when I follow the steps and drag the files into a folder in my content, I get the following errors:

You cannot create a ‘Material’ asset named ‘mcxeta1m’ in ‘/Game/FDX/Castle’, as there is already a ‘Texture2D’ asset with the same name in this folder. Renamed Assets: OriginalName:[/Game/FDX/Castle/mcxeta1m] NewName:[/Game/FDX/Castle/mcxeta1m1] There was no data to import in the provided source data. XML parse error in C:\Users\beben\Downloads\jvari-monastery\source\mcxeta1m\mcxeta1m.mtl (No document element found at character 200).

Thing is my folder is actually completely empty when I drag the files so the error is just not true. I even tried creating a completely empty project and importing and the same thing happened.

As a result if I ignor the error and go ahead I just get a static mesh with strange black spots:

Does anyone know what I am doing wrong? Thanks a lot.

Just import the obj file, UE should bring the material and texture automatically.