Custom validation error not appearing in form

defmodule Panacea.Sites.Validations.ValidateHostname do
  use Ash.Resource.Validation
  alias Ash.Error.Changes.InvalidAttribute

  alias Ash.Changeset

  @impl true
  def init(opts), do: {:ok, opts}

  @impl true
  @spec validate(Changeset.t(), Keyword.t()) :: :ok | {:error, term()}
  def validate(changeset, keyword) do
    IO.inspect(changeset)
    IO.inspect(keyword)

    # always return an error because i am trying to see it 
    {:error,
     InvalidAttribute.exception(
       message: "hello i am an error if you cannot see me that is a bigger error"
     )}
  end
end

...
  validations do
    validate Panacea.Sites.Validations.ValidateHostname
  end
...