Challenge expired

What it means

The resource existed and is permanently gone.

Example detail messages returned with this error:

• Challenge expired — start a new one.

What to do

See detail for the specific cause.

Response shape

All fremforge API errors are RFC 9457 problem+json:

{
  "type": "https://docs.frem.sh/reference/api/errors/challenge-expired",
  "title": "Gone",
  "status": 410,
  "detail": "..."
}

Branch on type, not on title or detail - those are human-readable and may be reworded.