为了达到预期的结果，我运行了下面的terraform脚本，做了一些修改，并将"Azurem"版本设置为3.29.1，或者您可以使用最新版本（3.37.0）;它对我起作用了，没有任何错误。
当我在我的环境中尝试它时，我遇到了同样的问题。我包括了三个IP配置，因为创建网关的最低标准是"3"&"2"客户端配置对等地址。

vi main.tf:

terraform {
  required_providers {
    azurerm = {
      source = "hashicorp/azurerm"
      version = "3.29.1"
    }
  }
}
provider "azurerm" {
  features{}
}
resource "azurerm_resource_group" "xxx" {
  name = "testfirst"
  location = "West Europe"
}
resource "azurerm_virtual_network" "vnet" {
  name                = "<xxxvnet>"
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
  address_space       = ["10.10.0.0/16"]
}
resource "azurerm_subnet" "xxxGatewaySubnet>" {
  name                 = "xxxGatewaySubnet>"
  resource_group_name  = azurerm_resource_group.rg.name
  virtual_network_name = azurerm_virtual_network.vnet.name
  address_prefixes     = ["10.10.1.0/24"]
}

resource "azurerm_public_ip" "xxip1" {
  name                = "xxip1"
  resource_group_name = azurerm_resource_group.rg.name
  location            = azurerm_resource_group.rg.location
  sku = "Standard"
  allocation_method   = "Static"
}
resource "azurerm_public_ip" "xxip2" {
  name                = "xxip2"
  resource_group_name = azurerm_resource_group.rg.name
  location            = azurerm_resource_group.rg.location
    sku = "Standard"
  allocation_method   = "Static"
}
resource "azurerm_public_ip" "xxip3" {
  name                = "xxip3"
  resource_group_name = azurerm_resource_group.rg.name
  location            = azurerm_resource_group.rg.location
    sku = "Standard"
  allocation_method   = "Static"
}
resource "azurerm_virtual_network_gateway" "xxxGateWay" {
  name                = "xxxGateWay"
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name

  sku           = "VpnGateway1"
  type          = "Vpn"
  active_active = true
  enable_bgp    = true

  ip_configuration {
    name                          = "xxxvnetGatewayConfig1"
    public_ip_address_id          = azurerm_public_ip.gwip1.id
    private_ip_address_allocation = "Dynamic"
    subnet_id                     = azurerm_subnet.gwsubnet.id
  }
  ip_configuration {
    name                          = "xxxxvnetGatewayConfig2"
    public_ip_address_id          = azurerm_public_ip.gwip2.id
    private_ip_address_allocation = "Dynamic"
    subnet_id                     = azurerm_subnet.gwsubnet.id
  }
 ip_configuration {
    name                          = "xxxvnetGatewayConfig3"
    public_ip_address_id          = azurerm_public_ip.gwip3.id
    private_ip_address_allocation = "Dynamic"
    subnet_id                     = azurerm_subnet.gwsubnet.id
  }
  vpn_client_configuration {
    address_space = ["172.16.0.0/16"]
    root_certificate {
      name = "ROOTCERT"
      public_cert_data = <<EOF
MIIC6zCCAdOgAwIBAgIQdGSy/6KEorFGCYqMgGcJ0TANBgkqhkiG9w0BAQsFADAY
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
LMd5oRRrWWIPI2kj6iOk8FGMNUaJ0q4PgEw0Z9kACoklUt6Wj6JaEU4GrfXQ6Ety
HdgWObzfF3I7azJlOM8Go4PE97LXMPRXJep6oOmQVQ==
      EOF 
    }
  }
  bgp_settings {
    asn = 65515
  
    peering_addresses {
      ip_configuration_name = "xxxvnetGatewayConfig1"
      apipa_addresses = ["169.254.21.2", "169.254.22.2"]
    }

    peering_addresses {
      ip_configuration_name = "xxxxvnetGatewayConfig2"
      apipa_addresses = ["169.254.21.6", "169.254.22.6"]
    }
  }
  tags = {
  test = "testpurpose"
  }
}

地形初始化：

地形平面图：

地形应用：

部署后门户中的点到站点配置：

Reference: terraform