Editor crashed when save

The editor crashed when I press Save all button. After that it crashed on load. I tried to rebuild project files but then I have an error on the load: "Failed to open map file. This is most likely because the map was saved with a newer version of the game " (I’m using the same version) after few seconds engine crashes again.
Is it possible that the files were damaged during the saving process? And if so how can I restore them?

Navigate to your project folder > saved > backups. And see if you have a backup of the map.

I don’t have a backups folder. And I guess not only the map was damaged

Yesterday I packed my project so I have cooked content in Saved/Cooked. Is it possible to restore somehow assets from this folder?