I have the same issue. I can manage to get into a project after struggling through the menu because changing the window size seemed to make it partially visible. Once I got into the project all of the dropdown menus did a similar thing
where it will duplicate the top left of the screen and show that rather than the actual menu. The screen will also sometimes turn black and show text that I assume is from the dropdown menu. I did try installing UEFN on an old PC and it seems to work perfectly fine on there. Both PC’s are on Windows 10, Nvidia GPUs and Intel CPUs. I did try reinstalling UEFN, updating my graphics drivers, verifying Fortnite and restarting/shutting down my PC, but nothing seemed to help. Hopefully this helped provide more helpful context.
