If your problem sounds like this, you're in the right place:

  • VAN 9051: Riot Vanguard internal error. Vanguard has encountered a critical error and cannot continue. Please restart your computer, or try reinstalling Vanguard by uninstalling Vanguard via the taskbar and relaunch Riot Client.
  • What does VAN 9051 mean?
  • Vanguard says it encountered a critical error and cannot continue.

Resolution

VAN 9051 means Vanguard hit an internal error it couldn't recover from and had to tap out. When that happens, the client closes so Vanguard can start fresh instead of continuing in a broken state.

Start with a full PC restart, then reinstall Vanguard if the error keeps showing up.

  1. Restart your PC. This gives Vanguard a fresh startup and can resolve temporary Vanguard errors.
  2. Remove and reinstall Vanguard. The quickest way to restore Vanguard's default settings is to manually uninstall it, then restart your PC and launch your game again to reinstall Vanguard.

Still having issues?

If you still see the error after trying these steps, submit a ticket to Player Support. Make sure you attach your logs so we can take a closer look.