Game won't sync to cloud

My game refused to sync to the cloud. I have another existing issue that I’ve mentioned in another topic, but because of that pre-existing issue, I’m afraid to reinstall the game in the event that, I lose a whole bunch of progress. Does anyone know how to fix this issue? I’ve reset the Microsoft store, and I’ve repaired the game multiple times.

Thank you in advance

Same problem every time i tried to open game it tells sign in needed when i s ign with my xbox account it start game from the beginning! And ignore my all achievements!