Ubisoft will check for missing or corrupted files (including dlls) and download them. 2. Check Antivirus/Windows Defender Quarantine
Since antivirus is the primary culprit, start here.
Giving both the game launcher and the game executable administrative privileges ensures that Windows isn't blocking the DLL from executing. assassin 39-s creed valhalla uplay r2 loader64.dll
Troubleshooting Assassin's Creed Valhalla: Fixing the uplay_r2_loader64.dll Error
Add the Assassin's Creed Valhalla installation folder as an Exclusion in your antivirus settings. 2. Verify Game Files in Ubisoft Connect Ubisoft will check for missing or corrupted files
Some technical support threads on Microsoft’s Q&A platform also point out that simply renaming the file can resolve startup crashes, even on unmodified copies, indicating that the file may sometimes be corrupted or misread by the system.
A: If you must replace it, copy it to: C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\games\Assassin's Creed Valhalla\ Overwrite the existing file. Always back up the original first. Giving both the game launcher and the game
Sometimes the error arises from an issue with the loader itself during language selection or startup. According to some community reports, renaming or replacing upc_r2_loader64.dll with a compatible R2Unlocker in the main directory can resolve issues, particularly if you are experiencing language selection errors or issues with the game launcher. Conclusion
: Running an obsolete version of Ubisoft Connect can cause compatibility conflicts with the game files. How to Fix the uplay_r2_loader64.dll Error