Error code

Xbox 0x80a40008

XBOX0x80a40008
Game/Platform Error· An error code shown by a game or gaming platform/launcher.

What it means

The console experienced a connectivity or account error while signing in..

How to fix it

  1. Check Xbox Live service status.
  2. test network connection in Settings > General > Network settings.
  3. remove and re-add the account.
  4. power cycle the console.

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