Open your Antivirus settings and locate or Exceptions .
Download the version of uplay_r1_loader64.dll from a site like DLL-files.com .
A: This means your antivirus is automatically quarantining the file again. You need to add the entire Assassin's Creed Unity installation folder to your antivirus's "Exclusions" or "Whitelist." This will tell the antivirus to ignore that specific folder and its contents. Open your Antivirus settings and locate or Exceptions
Reinstall the client; it should automatically restore missing Uplay API files like uplay_r1_loader64.dll 4. Manual DLL Replacement
If the above steps fail, the file may be permanently deleted. Official Version: If you own the game on Ubisoft Connect Verify Files feature to automatically redownload missing DLLs. Alternative: You need to add the entire Assassin's Creed
To prevent similar errors in the future:
When this file is missing, corrupted, or blocked by antivirus software, the game cannot verify your ownership or launch properly. Official Version: If you own the game on
: The game is attempting to load API assets from an older version of Uplay instead of the modernized Ubisoft Connect Desktop App.
the entire Assassin's Creed Unity installation folder to your antivirus Exclusion / Exception list to prevent future deletion. Method 2: Verify Game File Integrity (Official Launchers)
Does the error pop up or after a brief black screen?
If the file is completely gone from your system, you can try to reinstall it manually. : You can find the file on reputable sites like DLL-files.com : Once downloaded, extract the file and paste the uplay_r1_loader64.dll into the game’s main installation directory. Verification