I am working on an umbrella application that contains a separate Phoenix and Ecto application (my_web and my_app).

Then I Install the Bamboo email library for sending emails on the Phoenix App my_web. Bamboo can view the sent emails by using the Phoenix controller. I follow the configuration as described in the documentation.

# in config file (config/config.exs)
config: my_web, MyWeb.Mailer,
  adapter: Bamboo.LocalAdapter

# In Router
defmodule MyWeb.Router do

  if Mix.env ==: dev do
    # If using Phoenix
    forward "/ sent_emails", Bamboo.SentEmailViewerPlug

  end
end

However, there is an error message:
MyWeb.Bamboo.SentEmailViewerPlug.init / 1 function is undefined

It is wrong because the correct one is Bamboo.SentEmailViewerPlug module, not MyWeb.Bamboo.SentEmailViewerPlug.

Any ideas to resolve this are appreciated.

Thank you.