VANGUARD NOT INITIALISED ERROR : 128

Hello there, I'm facing an issue when launching Valorant, once I get to the landing page of the game, I get the Vanguard pop up I have done all kinds of troubleshooting and even uninstalled everything and installed again but it still persists Also, I don't have an Avast antivirus, just the Microsoft one the problem is still persisting even after following the troubleshooting guide .. Kindly assist me