Sometimes Windows Defender flags the uplay_r1_loader.dll as a false positive, preventing the save system from initializing. Add an exclusion for the game folder.
Assassin’s Creed Unity is arguably the most ambitious entry in the franchise, featuring a stunningly dense recreation of Revolutionary Paris. However, even years after its launch, players—especially those using certain "repacks" or "cracks"—frequently run into the same frustrating wall:
Ensure your crack is updated to v1.5.0 . This version fixed many of the engine-level bugs that caused save corruption in the first place.