Cause
Audiences, selectors and standalone highlights require the highlights.content path.
What to do
Add the highlights.content path or remove the audience.
application/problem+json
{
"type": "https://masnet.com/developers/errors/audience_without_highlights",
"title": "Audience without highlights",
"status": 422,
"detail": "...",
"code": "audience_without_highlights",
"correlation_id": "..."
}