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Error code VAN 51 indicates an issue with the Vanguard system. Here's what you can do to resolve it:
1. Restart the Riot Client and try launching VALORANT again.
2. If the problem persists, check the Support Site banners for possible ongoing issues or updates.
3. If it's still not resolved, try reinstalling Riot Vanguard:
- Go to the 'Add or Remove Programs' settings on your PC.
- Find 'Riot Vanguard' and uninstall it.
- Restart your computer.
- Open the Riot Client, which will reinstall Vanguard automatically.
Check for any problematic software that could be conflicting with Vanguard, and ensure your system is up to date. If issues continue, please visit the Riot Games support page: Riot Games Support.
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