Hi, I got it solved, will make sure to include code from next time.

I wonder if you are making a Repo call within the module body that’s being executed at compile time.

Was doing exactly this, was creating a module attribute with data fetched from database. Somehow ended up trying multiple calls from multiple contexts in multiple controllers all using module attributes only and getting the same error trying to troubleshoot this.

Made it into a private function

----------- Errornous code

@contact_query_recipients Email.list_contact_query_subscribers()
                           |> Enum.map(fn s -> {s.name, s.email} end)

----------- Fixed code

  defp list_recipients do
    Email.list_contact_query_subscribers()
    |> Enum.map(fn s -> {s.name, s.email} end)
  end