The suggestion is to wait it out. It’s likely building the Derived Data Cache, and will just take a long time that first time. That 39% seems to be the magic number when it kicks in.
So I am trying to learn more about unreal and i downloaded a zipped file from the unreal learning and trying to open it on my unreal using 4.25 and it will get to 39% percent and will freeze up. Anybody got any advice on what I should do?