That VAN 57 error usually means Riot Vanguard isn’t starting right, so try opening Services and restart “vgc” manually or just reinstall Vanguard from VALORANT, that fixed it for me once
yeah stacy's on point with that. the vgc service is usually the culprit for van 57. if restarting it or reinstalling from valorant doesn't fix it, sometimes running a game repair from the riot client itself can also kickstart vanguard properly. happened to me once after an update.