title: Terraform error - Error: Argument or block definition required
body: <p>My terraform code is as below:</p>
  
  <pre><code>terraform {
    backend "remote" {
      hostname     = "hostname.com"
      organization = "companyname"
      workspaces {
        name = "GIT-TIO-DEV"
      }
    }
  } 
  
  
  provider "aws" {
    region = "us-east-1"
    version = "~&gt; 2.22"
  }
  
  locals {
    aws_region                      = "us-east-1"
    ami_id                          = "ami-000db10762d0c4c05"
    appid_tag                       = "S00012"
    env_tag                         = "dev"
    name_tag                        = "TESTINSTANCE"
    awsaccount_tag                  = "myaccount"
    createdby_tag                   = "testuser"
    keyName                         = "tst-cloudservices-portal-dev"
    securityGroup                   = "sg-wwwwwwwww"
    vpc_id                          = "vpc-aaaaaaaaaaaaa"
    patchgroup_tag                  = "GroupA"
    iam_role                        = "tst-SR-ServiceRole"
    division_tag                    = "TIO"
    application_segment_tag         = "DEV"
    notes_tag                       = "link to notes 2"
    function_tag                    = "portal server"
    os_tag                          = "RHEL76"
    platform_tag                    = "Linux"
    instance_type                   = "t2.micro"
    automation_server_count         = 2
  }
  
  variable "health_check" {
    description = "A health check block"
    type        = map(string)
    default = {
    "enabled" = "true",
    "port" = "443", 
    "protocol" = "https"
    }
  
   }
  
  variable listener {
  [
      {
          instance_port = "80"
          instance_protocol = "tcp"
      },
      {
          instance_port = "443"
          instance_protocol = "tcp"
      }
  ]
  
  
  
  }
  # Adding EC2 afer Security Group
  
  module "tst-security-group-ec2" {
    source                          = "hostname.com/companyname/tst-security-group/aws"
    version                         = "1.0.2"
    group_name                      = "tst-myaccount-portal-dev"
    group_description               = "security group for portal dev"
    vpc_id                          = local.vpc_id
    appid_tag                       = local.appid_tag
    env_tag                         = local.env_tag
    awsaccount_tag                  = local.awsaccount_tag
    createdby_tag                   = local.createdby_tag
    function_tag                    = "Security group for portal dev"
    ingress = [{
      from_port   = 22
      to_port     = 22
      protocol    = "TCP"
      cidr_blocks = ["10.0.0.0/8"]
    },{
      from_port   = 3389
      to_port     = 3389
      protocol    = "TCP"
      cidr_blocks = ["10.0.0.0/8"]
      },{
      from_port   = -1
      to_port     = -1
      protocol    = "icmp"
      cidr_blocks = ["10.0.0.0/8"]
    }]
    egress =[ {
      from_port   = 0
      to_port     = 0
      protocol    = "-1"
      cidr_blocks = ["0.0.0.0/0"]
    }]
  }
  module "ec2-rhel-automation-server" {
    source                          = "hostname.com/companyname/tst-ec2-instance-rhel/aws"
    version                         = "1.2.6"
    aws_region                      = local.aws_region
    vpc_id                          = local.vpc_id
    ami_id                          = local.ami_id
    appid_tag                       = local.appid_tag
    application_segment_tag         = local.application_segment_tag
    awsaccount_tag                  = local.awsaccount_tag
    createdby_tag                   = local.createdby_tag
    default_security_group_id       = module.tst-security-group-ec2.id
    division_tag                    = local.division_tag
    env_tag                         = local.env_tag
    function_tag                    = local.function_tag
    keyName                         = local.keyName
    name_tag                        = "RHEL-AS${local.env_tag}"
    notes_tag                       = local.notes_tag
    os_tag                          = local.os_tag
    platform_tag                    = local.platform_tag
    ec2_server_count                = local.automation_server_count
    instance_type                   = local.instance_type
    hostname_tag                    = "ERNST${local.env_tag}WEB"
    iam_role                        = "tst-SR-ServiceRole"
    bootstrap_instance              = "false"
      }
  
  // Adding ALB Security Group
  module "tst-security-group-alb" {
    source                          = "hostname.com/companyname/tst-security-group/aws"
    version                         = "1.0.2"
    group_name                      = "tst-myaccount-portal-dev"
    group_description               = "security group for ALB"
    vpc_id                          = local.vpc_id
    appid_tag                       = local.appid_tag
    env_tag                         = local.env_tag
    awsaccount_tag                  = local.awsaccount_tag
    createdby_tag                   = local.createdby_tag
    function_tag                    = "Security group for ALB"
    ingress = [{
      from_port   = 443
      to_port     = 443
      protocol    = "TCP"
      cidr_blocks = ["10.0.0.0/8"]
  
     }]
    egress =[ {
      from_port   = 0
      to_port     = 0
      protocol    = "-1"
      cidr_blocks = ["0.0.0.0/0"]
    }]
  }
  // Creating a ALB
  module "tst-alb" {
    source                          = "hostname.com/companyname/tst-alb/aws"
    version                         = "1.0.5"
    subnets                         = ["subnet-xxxxxxxxxxxxx","subnet-yyyyyyyyyyy","subnet-zzzzzzzzzzzzz"]
    listener                        = var.listener
    createdby_tag                   = local.createdby_tag
    function_tag                    = "Terraform created ALB"
    vpc_id                          = local.vpc_id
    awsaccount_tag                  = local.awsaccount_tag
    appid_tag                       = local.appid_tag
    security_groups                 = module.tst-security-group-alb.id
    env_tag                         = local.env_tag
    health_check                    = var.health_check
  }
  </code></pre>
  
  <p>Unfortunately, I am getting an error like below:</p>
  
  <pre><code>Error: Argument or block definition required
  
    on main.tf line 52, in variable "listener":
    52: [
  
  An argument or block definition is required here.
  </code></pre>
  
  <p>I am going to create a separate variable file later. At the moment I want to get basic skeleton working.</p>