New update for LoL — latest build is live in the User Panel.
Get the loader from the User Panel, run the five steps once, then come back here if a queue or in-game error appears.
Open the User Panel, verify your license, and download the current loader. That file is the only install you need.
Completely uninstall Vanguard from your system before launching Nyxos. A clean environment is required.
Fully close Riot Client and League of Legends. Do not leave either running in the background.
Launch Nyxos Loader as Administrator, then enter the license key you received after purchase.
Click Start, then wait for Riot Client to open on its own. Do not launch the client manually.
Sign in and start your game. Once you are in, you are ready.
This exception can appear depending on the queue. After it happens, wait 10–15 minutes before using that game account again. A different account will work normally. This is uncommon — to reduce the chance of it, avoid repeatedly opening and closing custom games or tutorials in a short window.
If this error keeps happening for you — typically during champion select of a new match — click Restart in Nyxos once per game, during champion select. Do not spam Restart.
If a Vanguard event error appears during a match, use the same fix: click Restart in Nyxos once per game during champion select.
If the problem persists after following the steps above, contact us and include what you were doing when it happened.