Azure Functions runtime is unreachablea

Terraform Providers Azure
1

I am using the following code to create an azure function app but I am experiencing the Azure function runtime is unreachable error.

resource "azurerm_resource_group" "main" {
  name     = "rg-nonprod-${random_string.suffix.result}"
  location = "centralus"
}




resource "azurerm_windows_function_app" "main" {
  name                = var.name
  resource_group_name = azurerm_resource_group.main.name
  location            = “centralus”

  storage_account_name          = var.storage_account_name
  storage_uses_managed_identity = true

  service_plan_id           = var.service_plan_id
  virtual_network_subnet_id = var.virtual_snet_id

  https_only                 = true
  client_certificate_enabled = true
  client_certificate_mode    = "Required"

  key_vault_reference_identity_id = var.key_vault_reference_identity_id

  identity {
    type         = "UserAssigned"
    identity_ids = var.identity_ids
  }

  tags = var.tags

  app_settings = {
    WEBSITE_CONTENTOVERVNET                  = "1"
    WEBSITE_CONTENTSHARE                     = lower(var.name)
    WEBSITE_CONTENTAZUREFILECONNECTIONSTRING = var.storage_account_primary_connection_string

    WEBSITE_RUN_FROM_PACKAGE       = "1"
    FUNCTIONS_WORKER_RUNTIME       = "node"
    APPINSIGHTS_INSTRUMENTATIONKEY = var.application_insights_instrumentation_key
    AzureWebJobsStorage            = var.storage_account_primary_connection_string
  }

  site_config {
    application_stack {
      node_version = "~18"
    }

    ip_restriction {
      virtual_network_subnet_id = var.virtual_snet_id
    }
  }

  functions_extension_version = "~4"
}