workspace_media_invalid
HTTP 422§9.17 The customer team workspace on the phone (`/v1/mobile/workspace/*`, `/v1/mobile/voice/token`)
The image cannot be sent or attached. reason: not_base64, empty, unsupported_format (not JPEG/PNG/GIF), corrupt, too_large (over 5 MB, or over 5 MB together), too_many (over 10), not_attachable (not this customer's, not stored, or already on another text).
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/workspace_media_invalid",
"title": "…",
"status": 422,
"detail": "…",
"instance": "/v1/…"
}