class Users::RegistrationsController < Devise::RegistrationsController
  def new
    super
  end

  def create
    super
  end

  def destroy
    super
  end
end

どうして接続できないのかがわかりません。

データベースが原因の場合

どこを見れば良いのかおしえてください。(sqlite3)

devise が原因の場合

参考になるドキュメントまたは回答をいただければ幸いです。

情報が足りない場合

催促していただければ幸いです。

追加の情報

log そのまま

Errno::ECONNREFUSED (Connection refused - connect(2) for "localhost" port 25):
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