Cause
A selected audience carries no selector, or a standalone highlight carries none.
What to do
Provide at least one granted group or person.
application/problem+json
{
"type": "https://masnet.com/developers/errors/audience_required",
"title": "Audience required",
"status": 422,
"detail": "...",
"code": "audience_required",
"correlation_id": "..."
}