VAN 9001 means Vanguard has detected that TPM 2.0 and/or Secure Boot are disabled in Windows — here's how to check, enable, and troubleshoot both settings so VALORANT will launch.

Valorant

How to Fix: VALORANT Error 43

VALORANT Error 43 ("There was an error connecting to the platform") is a connectivity issue at launch — usually fixed by restarting the client, checking server status, or clearing Riot Client settings files.