Azure – Unable to connect to virtual machine using RDP (Remote Desktop)

I have created a virtual machine using the below terraform code:

Here is the VM code:

# demo instance
resource "azurerm_virtual_machine" "demo-instance" {
  name                = "${var.prefix}-vm"
  location            = var.resource_group_location
  resource_group_name = var.resource_group_name
  network_interface_ids = [
  azurerm_network_interface.demo-instance.id]
  vm_size = "Standard_A1_v2"

  # this is a demo instance, so we can delete all data on termination
  delete_os_disk_on_termination    = true
  delete_data_disks_on_termination = true

  storage_image_reference {
    publisher = "RedHat"
    offer     = "RHEL"
    sku       = "7-RAW"
    version   = "7.5.2018042521"
  }
  storage_os_disk {
    name              = "RED-HAT-osdisk1"
    caching           = "ReadWrite"
    create_option     = "FromImage"
    managed_disk_type = "Standard_LRS"
  }
  os_profile {
    computer_name  = "MyOS"
    admin_username = "MyUsername"
    admin_password = "Password1234!"
  }

  os_profile_linux_config {

    disable_password_authentication = false
  
  }

}

resource "azurerm_network_interface" "demo-instance" {
  name                = "${var.prefix}-instance1"
  location            = var.resource_group_location
  resource_group_name = var.resource_group_name

  ip_configuration {
    name                          = "instance1"
    subnet_id                     = azurerm_subnet.demo-internal-1.id
    private_ip_address_allocation = "Dynamic"
    public_ip_address_id          = azurerm_public_ip.demo-instance.id
  }
}

resource "azurerm_network_interface_security_group_association" "allow-ssh" {
  network_interface_id      = azurerm_network_interface.demo-instance.id
  network_security_group_id = azurerm_network_security_group.allow-ssh.id
}

resource "azurerm_public_ip" "demo-instance" {
  name                = "instance1-public-ip"
  location            = var.resource_group_location
  resource_group_name = var.resource_group_name
  allocation_method   = "Dynamic"
}

and here is the network config:

resource "azurerm_virtual_network" "demo" {
  name                = "${var.prefix}-network"
  location            = var.resource_group_location
  resource_group_name = var.resource_group_name
  address_space       = ["10.0.0.0/16"]
}

resource "azurerm_subnet" "demo-internal-1" {
  name                 = "${var.prefix}-internal-1"
  resource_group_name  = var.resource_group_name
  virtual_network_name = azurerm_virtual_network.demo.name
  address_prefixes     = ["10.0.0.0/24"]
}

resource "azurerm_network_security_group" "allow-ssh" {
    name                = "${var.prefix}-allow-ssh"
    location            = var.resource_group_location
    resource_group_name = var.resource_group_name

    security_rule {
        name                       = "SSH"
        priority                   = 1001
        direction                  = "Inbound"
        access                     = "Allow"
        protocol                   = "Tcp"
        source_port_range          = "*"
        destination_port_range     = "22"
        source_address_prefix      = var.ssh-source-address
        destination_address_prefix = "*"
    }
}

As a result, i am able to connect to the virtual-machine using SSH. However, when i try to connect using RDP, i face with the below error:

What i have tried:

I read this document and added an inbound role into my network

However, i am not still able to get connect with RDP.
So, far i know that my VM is in network because it has a password and i know it is running because i can connect using SSH. But, i still don’t know why the RDP does not work.