Rodauth uses Roda's render plugin for rendering the default view & email templates, which in turn depends on the Tilt gem. In Rails applications, you're expected to have custom view & email templates that will be rendered by Rails, but Roda rendering is still turned on by default so that everything still works without custom templates.

If you've set up every view & email template to be rendered by Rails, you can pass the render: false option to Rodauth to skip loading Roda's render plugin and Tilt:

class RodauthApp < Rodauth::Rails::App
  configure RodauthMain, render: false
  configure RodauthAdmin, :admin, render: false
end

Or if you're using Rodauth as a library:

RodauthMain = Rodauth::Rails.lib(render: false) do
  # ...
end