Role Not Effective in terraform-provider-kaleido's resource "kaleido_node/node"

[shohu]

Even when specifying a role other than "validator" as follows

resource "kaleido_node" "node" {
  count          = var.node_count
  consortium_id  = var.consortium_id
  environment_id = var.environment_id
  membership_id  = var.membership_id
  name           = "Node1"
  role           = "monitor"  // "validator"
}

The following error message appears:

│ Error: Could not create node Node1 in consortium xxxxx in environment yyyyy with status 403: {"requestId":"a4bgwk1ufh","errorMessage":"This member must be on one of the following plans to create nodes as signers: team, business, enterprise"}

The version is v0.2.15.

What should I specify for the role?