The Vanguard Error VAN 57 in League of Legends occurs when Riot’s anti-cheat engine, Riot Vanguard, fails to start correctly.

If the League of Legends Error Code 900 has occurred on your Windows 11/10 gaming rig, the fixes in this post is sure to help you!

Quite simply, in order to fix the error, you must stay active in the game’s client. “Your Session Has Expired” is a Riot Games’ introduced system to alleviate the stress on the game’s ...