UBI-ERR-001 Affected Software: Ubisoft Connect, Uplay (legacy), Tom Clancy’s Rainbow Six Siege, Assassin’s Creed series, Far Cry series, The Division 2, and other Ubisoft titles. Last Updated: 2026-04-14
Third-party programs like antivirus software or Riot Vanguard have been known to interfere with the launcher's installation or operation. Step-by-Step Fixes for Error Code 1 1. Run as Administrator
If the error resolves, re‑enable services and startup items one by one to identify the conflicting software (often RGB controllers, VPNs, or capture software).
Since the original Game Launcher has been replaced by Ubisoft Connect, installing the modern client usually bridges the gap for older games .
Ubisoft Game Launcher Error Code 1
UBI-ERR-001 Affected Software: Ubisoft Connect, Uplay (legacy), Tom Clancy’s Rainbow Six Siege, Assassin’s Creed series, Far Cry series, The Division 2, and other Ubisoft titles. Last Updated: 2026-04-14
Third-party programs like antivirus software or Riot Vanguard have been known to interfere with the launcher's installation or operation. Step-by-Step Fixes for Error Code 1 1. Run as Administrator ubisoft game launcher error code 1
If the error resolves, re‑enable services and startup items one by one to identify the conflicting software (often RGB controllers, VPNs, or capture software). UBI-ERR-001 Affected Software: Ubisoft Connect
Since the original Game Launcher has been replaced by Ubisoft Connect, installing the modern client usually bridges the gap for older games . Tom Clancy’s Rainbow Six Siege