# E15039 — WhatsAppSenderNotConnected

The from number has not finished connecting to WhatsApp.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `WhatsAppSenderNotConnected`

## What to do

Only a number whose status is `connected` can send, and GET /v1/whatsapp/numbers reports the status of each. A number at `preparing` reaches `awaiting_signup` on its own, one at `awaiting_signup` needs WhatsApp Embedded Signup completed on it, and one at `pending` is still being registered with WhatsApp. A number at `failed` reports the reason it stopped; disconnect it and connect it again. Send once its status reads `connected`.

## Related

- [E15xxx — WhatsApp sending & delivery](/docs/api/errors/E15xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`