Cause
A group of the audience is not in allowed_group_ids of the grant.
What to do
Select only granted groups.
application/problem+json
{
"type": "https://masnet.com/developers/errors/group_not_granted",
"title": "Group not granted",
"status": 403,
"detail": "...",
"code": "group_not_granted",
"correlation_id": "..."
}