Reference
FAN_RESEND_FAILED
The tickets could not be sent
The tickets could not be sent
HTTP status 503 Service Unavailable, code FAN_RESEND_FAILED.
What it means#
The mail could not be sent just now. Nothing was counted against the limits, so the same call may be retried.
What to do#
Retry with the same idempotency key in a little while, or hand the conversation to a person.
On the wire#
Every error response carrying this code names this page in error.moreInfo,
with the request id in the query string. See Error codes for
the response shape and the list of every code.