Error code

Xbox 0x803F8001

XBOX0x803F8001
Game/Platform Error· An error code shown by a game or gaming platform/launcher.

What it means

The console had trouble checking usage rights, or the game is no longer in the Game Pass catalog..

How to fix it

  1. Check Xbox Live service status.
  2. verify subscription is active under Settings > Account > Subscriptions.
  3. set console as Home Xbox.
  4. sign out and back in to refresh license.

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