"ubiorbitapi_r2_loader.dll is missing" typically indicates that a critical Ubisoft API library file is either missing, corrupted, or has been quarantined by security software
C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\ (main launcher folder)C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\games\Far Cry 3\bin\ (game binary folder)Ubisoft Connect Users: Go to Games > Select Far Cry 3 > Properties > Verify files. far cry 3 error ubiorbitapi-r2-loader.dll is missing