Error code

Riot VAN 9003

RIOTVAN 9003
Game/Platform Error· An error code shown by a game or gaming platform/launcher.

What it means

Secure Boot is not enabled.

How to fix it

  1. Enable Secure Boot in your BIOS or UEFI.
  2. verify TPM 2.0 is on.
  3. restart your PC.
  4. relaunch VALORANT.

Not affiliated with Riot. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.