business_connection_not_ready
The chosen connection cannot take this yet; blockers names why (connection_not_active, capability_not_active, mapping_incomplete, currency_not_supported, template_not_selected, location_not_selected, not_authorized).
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/business_connection_not_ready",
"title": "…",
"status": 409,
"detail": "…",
"instance": "/v1/…"
}