HTTP 404 error with empty error text

[gzurowski]

I am attempting to apply the following simple template:

resource "improvmx_domain" "retracted_domain" {
  domain = "retracted.domain"
}

resource "improvmx_email_forward" "user1" {
  domain            = improvmx_domain.retracted_domain.domain
  alias_name        = "user1"
  destination_email = "[email protected]"
}

resource "improvmx_email_forward" "user2" {
  domain            = improvmx_domain.retracted_domain.domain
  alias_name        = "user2"
  destination_email = "[email protected]"
}

resource "improvmx_email_forward" "info" {
  domain            = improvmx_domain.retracted_domain.domain
  alias_name        = "info"
  destination_email = "${improvmx_email_forward.user1.destination_email},${improvmx_email_forward.user2.destination_email}"
}

This will result in the following error on first attempt:

improvmx_domain.retracted_domain: Creating...
improvmx_domain.retracted_domain: Creation complete after 1s [id=retracted.domain]
improvmx_email_forward.user1: Creating...
improvmx_email_forward.user2: Creating...
improvmx_email_forward.user2: Creation complete after 0s [id=5025340]
improvmx_email_forward.user1: Creation complete after 0s [id=5025341]
improvmx_email_forward.info: Creating...
╷
│ Error: HTTP response code 404, error text: []
│
│   with improvmx_email_forward.info,
│   on main.tf line 18, in resource "improvmx_email_forward" "info":
│   18: resource "improvmx_email_forward" "info" {
│
╵

A second attempt will succeed.