Uninstall the current app via your system settings.
Permissions are the most common culprit. If the game doesn't have administrative access, it may be blocked from reading the Ubisoft Connect library files. Navigate to your game’s installation folder. Right-click the game's file. Select Properties > Compatibility tab. Check Run this program as an administrator . Repeat this for the UbisoftConnect.exe as well. 2. Verify Game Files
The error typically indicates a conflict between an older Ubisoft game and a newer version of the Ubisoft Connect (formerly Uplay) launcher. This often happens because the game is looking for a specific function in a legacy .dll file that has been moved or renamed in modern updates. Top Recommended Fixes
A fellow gamer on a Steam Community thread suggested "purging" Ubisoft Connect entirely—deleting the AppData local folders before a fresh reinstall.