Error: Unsupported argument when trying to create vpc using terraform module via service catalog provisioned product

getting the given error :╷
│ Error: Unsupported argument

│ on main.tf line 4, in module “VPC”:
│ 4: cidr_block = var.cidr_block

│ An argument named “cidr_block” is not expected here.

I am creating the vpc from vpc module the module has a resource block which triggers the service catalog provisioned product which create the vpc by calling service catalog template which is a cloudformation templates.
when I am calling the module in the child module also getting the above error:

I have define the input variable in the module variable.tf and in the child module variable.tf from where i am calling the the module along with the argument as well cidr_block = var.cidr_block don’t know what is missing.

Module -VPC Content:
main.tf
data “aws_region” “current” {}

locals {
vpc_name = “${var.vpc}”
}

resource “aws_servicecatalog_provisioned_product” “vpc” {
name = local.vpc_name
product_name = “VPC”
provisioning_artifact_name = “1.5.0”

aws servicecatalog describe-provisioning-parameters --product-name VPC --provisioning-artifact-name 1.1.0 --path-name Networking

provisioning_parameters {
key = “vpcname”
value = local.vpc_name ### where to pass the value for t
}

provisioning_parameters {
key = “cidrblocksize”
value = var.mask
}

tags = {
region = data.aws_region.current.id
short_name = var.vpc
}

}

Getting VPC data

data “aws_vpc” “this” {
depends_on = [aws_servicecatalog_provisioned_product.vpc]

filter {
name = “tag:Name”
values = [local.vpc_name]

}
}

variable.tf
variable “vpc” {
description = “Vpc and subnet definition”
type = string

}

variable “cidr_block” {

description = “vpc mask for cidr”
type = string

}

=============================

Child module :
main.tf

module “VPC” {
source = “git::Sign in to your account
cidr_block = var.cidr_block

}

module “private_subnet” {
source = “…/modules/private_subnet”
depends_on = [module.VPC]
subnet_mask = var.subnet_mask
vpc_id = module.VPC.vpc_id

}

variable.tf:
variable “region” {
description = “Region for deploying resources (auto-filled by the terraform Gradle plugin)”
type = string
default = “eu-west-1”
}

variable “vpc” {
description = “Vpc and subnet definition”
type = string

}

variable “cidr_block” {

description = “vpc mask for cidr”
type = string

}

variable “subnet_mask” {

description = “subnet mask for the subnets”
type = number

}

Any help or clue, still getting the same issue even though i have declared the variables in the root and the child module.