Predictive Routing Queue Config 400 via Terraform

Could someone clarify why the predictive routing queue configuration fails during apply?

Using Terraform provider v1.65.2. Region: Australia/Sydney.

Deploying a new queue with predictive routing enabled. The HCL validates, but the API returns 400.

Resource:

resource "genesyscloud_routing_queue" "test_q" {
 name = "Test Pred Queue"
 enabled = true
 
 routing_type = "Predictive"
 
 predictive_routing {
 max_contacts = 10
 max_contacts_per_agent = 2
 max_queue_seconds = 300
 }
}

Error output:

Error: Error creating Routing Queue: 400 Bad Request
{ “errors”: [ { “code”: “INVALID_INPUT”, “message”: “Predictive routing settings are invalid for this queue type or region.” } ] }

The queue is standard. No custom attributes.

Checked GC CLI docs. Predictive is supported in au-1.

Is there a missing dependency? Or a specific API version issue with the provider?

Logs show the POST to /api/v2/routing/queues fails immediately. Payload looks correct per schema.

Any insight appreciated.