public function requirements()
    {
        if (!$this->_step('language')) {
            $this->redirect(['plugin' => 'Installer', 'controller' => 'startup', 'action' => 'language']);
        }

        $tests = $this->_getTester();
        $errors = $tests->errors();

        if (empty($errors)) {
            $this->_step();
        }

        $this->title(__d('installer', 'Server Requirements'));
        $this->set('errors', $errors);
    }