Here's what you can also try doing: backup all your edited files, and revert FIFA to vanilla state. Test if it works (just to be sure). Then, try adding your edits but not all at once, but maybe by little chunks, for example: replace DB - test if game works, then replace kits - test again, then - replace faces - etc. Thus you will narrow down the location of corrupted files. For example, if after adding faces/ folder the game will crash, then you can start doing it again but on a smaller scope: add 50 faces, test, then add another 50 etc. It will be time consuming and tedious, but it can save you redoing all your hard work. There is also possibility, that game crashing on loading screen isn't related to assets, but to lua files? At least this is my experience.