Go to your Library > Select the game > Click Properties > Click Verify files .

What does this actually mean? In simple terms, when you launch a Ubisoft game, it makes a call to a specific part of the game's code—a "procedure"—to tell the Ubisoft Connect (formerly Uplay) platform to track an achievement. The error indicates that the game is looking for this specific piece of code in a dynamic link library (DLL) file, but it cannot find it there. This is not a problem with the game's storyline or your saved progress, but rather a technical disruption in the communication between the game and Ubisoft's infrastructure that handles achievements and online features.

Open your Windows and go to Programs and Features . Uninstall Ubisoft Connect .

Manually delete any remaining cache or app configuration files by navigating to C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher and deleting the entire folder.

This often grants the game the permissions it needs to access the achievement API. Toggle the Overlay:

user wants a long article about the error message "uplay-ach-earnachievement could not be located". I need to provide a comprehensive guide covering causes, solutions, and related issues. To gather sufficient information, I will search for the error message and related topics. search results show several relevant pages. I will open some of them to gather detailed information. search results provide a good amount of information. I will now organize the article. The article will cover: understanding the error, common causes, solutions, related issues, preventing future errors, and resources. I will cite the sources appropriately. error often appears as a pop-up message with text similar to: "The procedure entry point uplay_r1.UPLAY_ACH_EarnAchievement could not be located in the dynamic link library uplay_r1_loader.dll." Alternative variations might reference UPLAY_ACH_EarnAchievement without the uplay_r1. prefix, or refer to a different library like AC4BFSP.exe .

By taking these precautions, you can minimize the risk of encountering errors and ensure a smooth gaming experience.

If your antivirus software is overly aggressive, it may have flagged the Ubisoft DLL (usually uplay_r1.dll or upc_r2_loader64.dll ) as a false positive and deleted it.

Click the in the top-left corner and open Settings .

The error centers around the communication between your game file and your Ubisoft launcher software.

Files like uplay_r1_loader64.dll or uplay_r1.dll may be missing or have been quarantined by your antivirus as a "false positive".

This is almost always caused by an incomplete or corrupted update of the client. When the game installs or updates, it expects specific files to be present in the system directory. If Ubisoft Connect updated in the background but the game files were not verified, or if a DLL was blocked by antivirus software, this error triggers.

: You are using an old version of Uplay instead of the modern Ubisoft Connect .