This error usually occurs when the Ubisoft Connect (formerly Uplay) launcher is outdated, or its core library files (DLLs) have been corrupted or blocked by your antivirus. The specific mention of "earnachievement" indicates the launcher's achievement-tracking module is failing to initialize when the game starts.
Here’s a step-by-step guide to fix the “uplay-ach-earnachievement could not be located” error, typically seen when launching a Ubisoft game (e.g., Assassin’s Creed, Rainbow Six Siege, Far Cry). 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. This error usually occurs when the Ubisoft Connect
Fixing this error usually requires restoring the integrity of the Ubisoft client or its associated files: Uninstall Ubisoft Connect via Control Panel (games remain