After placing the fixed save into the folder:
Most save issues occur because of a mismatch between your and the Xbox Cloud . Close the game completely.
For console players:
Many downloaded “100% saves” fail because they lack your user ID. Use a tool like (available from trusted modding communities) or Horizon (by Turbolag) to resign the save:
Xbox games often utilize cloud saves. Check if your save is synced to the cloud and try re-downloading it.