Files like uplay_r1_loader64.dll or uplay_r1.dll may be missing or have been quarantined by your antivirus as a "false positive".
: Right-click the game > Properties > Installed Files > Verify integrity of game files . uplay-ach-earnachievement could not be located
Go to your Ubisoft Connect installation folder (usually C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher ). Find Uplay.dll or uplay_r1_loader.dll . Files like uplay_r1_loader64
I can provide a more tailored fix once I know the you're trying to play. uplay-ach-earnachievement could not be located
: Go to Games > Select your game > Properties > Verify files .