Campaign crashed on the command spire, can't load save file - Series X

The game crashed and went to the main menu in-game after a specific boss battle in this level. Now I am unable to load the file via ‘continue’ or by loading from ‘load game.’ I don’t really know how to fix this. I’ve seen reports on PC that are similar, but not series x. Help would be appreciated; looks like I’m about to lose hours of progress.