I managed to solve the problem in the way described above:
- deleted the Intermediate and Saved folders in the “C:\Users\admin\AppData\Local\UnrealEditorFortnite” directory
- verified in the launcher
- after launching the project, moved the prop and made a new snapshot
after that, the session started and I was able to perform a memory calculation
I also noticed that without making a change and creating a snapshot, everything still does not work, at the moment I managed to make one calculation and reboot the session several times - so far everything works.