Completely close (check your Windows system tray to ensure it is fully shut down).
: Some antivirus programs mistakenly flag the achievement-tracking DLLs as "suspicious." Check your "Quarantine" or "Protection History" and restore any files removed from the game's installation folder. uplay-ach-earnachievement could not be located
Some users have resolved this by manually replacing the uplay_r1.dll and uplay_r1_loader.dll files in the game's main directory with updated versions sourced from a working Ubisoft Connect installation. Completely close (check your Windows system tray to
How to Fix the "uplay-ach-earnachievement could not be located" Error uplay-ach-earnachievement could not be located
If the above steps fail, you can sometimes fix the issue by manually replacing the problematic loader file.