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Apply this rule to both the launcher client and the base execution target: Go to C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher .
Download the newest installer from the official Ubisoft Connect website. Run the installer to overwrite outdated files. 2. Verify Game Files
Navigate to your Ubisoft installation folder (Default: C:\Program Files (x86)\Ubisoft\Ubisoft Game Launch ). Look for files named uplay_r1.dll or uplay_r1_loader.dll . Copy these files ( Ctrl + C ).
⚠️ Disabling EAC means you cannot access online multiplayer matchmaking or cooperative game modules. 2. Manual Dynamic Link Library (.dll) Replacement
Does one of these resolve the launcher error for you?
Under , check if Steam or Epic Games is linked.
Essential files like uplay_r164.dll or uplay_aux_r164.dll may be missing or corrupted in the launcher's directory. Troubleshooting & Solutions Launch Argument
If you have tried all six fixes and the error persists, you are likely dealing with a deeper Windows profile corruption. Create a new Windows User Account (Local Account) and install Ubisoft Connect there. This bypasses all permission issues related to your main user profile.
