Antivirus software, including Windows Defender, often flags the uplay_r1_loader.dll file as a false positive and moves it to quarantine. This is the most common reason for the "could not be located" error.
Installing or re-installing Ubisoft Connect PC | Ubisoft Help uplayachearnachievement could not be located
Many users see this error because they are attempting to run an old version of the Uplay client. Ubisoft has transitioned to , and older versions of the software may no longer be compatible with modern game updates. including Windows Defender
Here is a comprehensive guide to resolving this error and getting back into your game. 1. Update to Ubisoft Connect uplayachearnachievement could not be located