If you aren’t able to log in or play the game at the moment you aren’t alone. Numerous players have reported that they are unable to play and Riot have confirmed that they are exoeriencing issues across multiple platforms at the moment. No word currently on when this will be fixed as…
There is a platform outage currently affecting multiple Riot games, including VALORANT. Many players will be unable to log into the game. We're working on it diligently to get it back up and running.
— Ziegler (@RiotZiegler) August 25, 2020