Cannot create app service plan with error: This object does not have an attribute named "id"

Whenever I try to run terraform plan its giving me an output error as below:

╷
│ Error: Unsupported attribute
│ 
│   on appservices.tf line 38, in module "windows_web_app":
│   38:   service-plan-id            = module.app_service_plan[0].id
│     ├────────────────
│     │ module.app_service_plan[0] is a object
│ 
│ This object does not have an attribute named "id".```

This is my code: 
data "terraform_remote_state" "resource-group-source" {
  backend = "azurerm"
  config = {
    resource_group_name  = local.settings.common.remote-state-config.resource_group_name
    storage_account_name = local.settings.common.remote-state-config.storage_account_name
    container_name       = local.settings.common.remote-state-config.container_name
    key                  = "tf.tfstate"
  }
}
module "app_service_plan" {
  source                       = "../../../modules/az-appservices"
  count                        = local.settings.app_service_plan.inflate ? 1 : 0
  name                         = local.settings.app_service_plan.app-name
  location                     = data.terraform_remote_state.resource-group-source.outputs.app-team-rg[0].resource_group.location
  resource-group-name          = data.terraform_remote_state.resource-group-source.outputs.app-team-rg[0].resource_group.name
  os-type                      = local.settings.app_service_plan.os-type
  sku-name                     = local.settings.app_service_plan.sku-name
  zone-balancing-enabled       = local.settings.app_service_plan.zone-balancing-enabled
  worker-count                 = local.settings.app_service_plan.worker-count
  maximum-elastic-worker-count = local.settings.app_service_plan.maximum-elastic-worker-count
  app-service-environment-id   = local.settings.app_service_plan.app-service-environment-id
  per-site-scaling-enabled     = local.settings.app_service_plan.per-site-scaling-enabled
  tags                         = local.settings.common.tags
}

module "windows_web_app" {
  source                     = "../../../modules/az-webapp"
  for_each                   = local.settings.web-app.inflate ? merge(local.app-settings, local.connection-strings) : {}
  name                       = local.settings.web-app.name
  location                   = data.terraform_remote_state.resource-group-source.outputs.app-team-rg[0].resource_group.location
  resource-group-name        = data.terraform_remote_state.resource-group-source.outputs.app-team-rg[0].resource_group.name
  service-plan-id            = module.app_service_plan[0].id
  client-affinity-enabled    = local.settings.web-app.client-affinity-enabled ? 1 : 0
  client-certificate-enabled = local.settings.web-app.client-certificate-enabled ? 1 : 0
  client-certificate-mode    = local.settings.web-app.client-certificate-mode
  # azurerm_service_plan.example.id
  tags       = local.settings.common.tags
  https-only = local.settings.web-app.https-only ? 1 : 0
  
  site-config = {

  app-settings = [
    {
      name  = each.value.name
      value = each.value.value
    },
  ]

  connection-strings = [
    {
      name  = each.value.name
      type  = each.value.type
      value = each.value.value
    },
  ]

  # application-stack = [
  #   {
  #     current_stacke  = each.value.value
  #     dotnet_version  = each.value.value

  #   },
  # ]
  # current-stack  = "dotnet"
  # dotnet-version = "v7.0"

  }


  identity-type = local.settings.web-app.identity-type
  always-on     = local.settings.web-app.site-config[0].always-on ? 1 : 0
  worker-count  = local.settings.web-app.worker-count
  http2-enabled = local.settings.web-app.http2-enabled ? 1 : 0

  depends_on          = [module.app_service_plan]
}


Any help be greatly appreciated!```

P.S i used terraform console and done “module.app_service_plan” and its just showing 2 empty square brackets like this “

Share the code and the configuration you’re passing to it. That will shed more light.

If module.app_service_plan[0] has no attribute id, it means there is no output named id defined within that module.