dellemc.powerscale.subnet using missing isilon_sdk call

When attempting to create a subnet using the ansible powerscale subnet module, I'm getting the following error (and have confirmed that the call doesn't seem to exist in sdk source):

TASK [isilon : Create Subnet] ***********************************************************************************************************************************************************************************************

fatal: [isilonb-data-sip]: FAILED! => {"changed": false, "msg": "Creating subnet data failed with error: module 'isilon_sdk.v9_5_0' has no attribute 'ConfigNetworkRange'"}

The play is pretty simple:

- name: Create Subnet

  dellemc.powerscale.subnet:

    onefs_host: "{{isilon_api_host}}"

    api_user: "{{isilon_api_user}}"

    api_password: "{{isilon_api_password}}"

    verify_ssl: false

    groupnet_name: "groupnet0"

    subnet_name: "data"

    description: "data network subnet"

    netmask: "{{ netmask }}"

    gateway_priority: 5

    subnet_params:

      sc_service_addrs:

        - start_range: "{{ ip }}"

          end_range: "{{ ip }}"

      gateway: "{{ router }}"

      mtu: 9000

      sc_service_addrs_state: "add"

    state: 'present'    

  when: "'groupnet0.data' is not in powerscale_info.NetworkSubnets"