Issue #3456149 by pooja_sharma, smustgrave, quietone, catch, alexpott: Fix...

use Drupal\Core\Config\ConfigFactoryInterface;

use Drupal\Core\Config\TypedConfigManagerInterface;

use Drupal\Core\Render\Element;

use Drupal\Core\StringTranslation\TranslatableMarkup;

use Drupal\Component\Render\MarkupInterface;

use Drupal\Core\Render\Markup;

use Drupal\Core\Url;

use Symfony\Component\DependencyInjection\ContainerInterface;

   * @param \Symfony\Component\Validator\ConstraintViolationListInterface $violations

   *   The list of constraint violations that apply to this form element.

   *

   * @return \Drupal\Core\StringTranslation\TranslatableMarkup

   * @return \Drupal\Component\Render\MarkupInterface|\Stringable

   *   The rendered HTML.

   */

  protected function formatMultipleViolationsMessage(string $form_element_name, array $violations): TranslatableMarkup {

  protected function formatMultipleViolationsMessage(string $form_element_name, array $violations): MarkupInterface|\Stringable {

    $transformed_message_parts = [];

    foreach ($violations as $index => $violation) {

      // Note that `@validation_error_message` (should) already contain a

        '@validation_error_message' => $violation->getMessage(),

      ]);

    }

    return $this->t(implode("\n", $transformed_message_parts));

    // We use \Drupal\Core\Render\Markup::create() here as it is safe,

    // rather than use t() because all input has been escaped by t().

    return Markup::create(implode("\n", $transformed_message_parts));

  }

  /**