Map is different when opened in Linux

Hi there!

I have a very basic knowledge of Unreal Engine. A friend sent me a project made with UE4.22 on Windows. When i open the project in Windows, everything works as expected, but when i try to open the the very same project using UE 4.22 on Linux, i can’t see the main map: opening the same file, i get a different map with different content (???).

What could be wrong?