The most effective way to fix this error is to recover the file from your security software's quarantine or manually restore it from the game files. Check Antivirus Quarantine : Open your antivirus software (such as Windows Defender Malwarebytes ) and navigate to the Protection History Quarantine
Download the latest version of the Ubisoft Connect Desktop App. The most effective way to fix this error
Look for a subfolder named or 3DM (common in specific digital distributions). Copy the uplay_r1_loader64.dll file found there. The most effective way to fix this error