I have the same i9-14900KF 24 core, rtx 4090 24gb.
there seems to be some kind of compatiblity issue with the latest Gen processors and unreal. people were indicating that it was a memory leak. this would make sense as most if not all errors preventing a project loading are access violations. 5.4.2 is extremely unstable certainly with my hardware spec. I’m just waiting for a cable so I can see my bios before trying the link, will keep you posted if it solves it for me