Cause
The delivery ledger is unavailable, or the change was saved and its mirror is pending.
What to do
Retry in a few seconds.
application/problem+json
{
"type": "https://masnet.com/developers/errors/ledger_unavailable",
"title": "Delivery ledger unavailable",
"status": 503,
"detail": "...",
"code": "ledger_unavailable",
"correlation_id": "..."
}