googleapi: Error 400: Can't parse NodePool version ""., badRequest

function standardPool(machineType: string, initialNodeCount = 0) {
  return {
    upgradeSettings: {
      maxSurge: 2,
      maxUnavailable: 0,
    },
    name: machineType,
    initialNodeCount,
    autoscaling: {
      minNodeCount: 0,
      maxNodeCount: 10,
    },
    nodeConfig: {
      machineType,
      diskSizeGb: 30,
      preemptible: false,
      shieldedInstanceConfig: {
        enableIntegrityMonitoring: true,
        enableSecureBoot: true,
      },
      metadata: {
        "disable-legacy-endpoints": "true",
      },
      oauthScopes: [
        "<https://www.googleapis.com/auth/devstorage.read_only>",
        "<https://www.googleapis.com/auth/logging.write>",
        "<https://www.googleapis.com/auth/monitoring>",
        "<https://www.googleapis.com/auth/servicecontrol>",
        "<https://www.googleapis.com/auth/service.management.readonly>",
        "<https://www.googleapis.com/auth/trace.append>",
      ],
      //TODO: More secure config
      //   serviceAccount: serviceAccount.accountId,
      //   oauthScopes: ["<https://www.googleapis.com/auth/cloud-platform>"]
    },
    version: "",
    management: {
      autoRepair: true,
      autoUpgrade: true,
    },
  } as gcp.types.input.container.ClusterNodePool;
}