Issue #3293030: TypeError: Argument 1 passed to...

namespace Drupal\single_content_sync\Form;

use Drupal\Core\Access\AccessResult;

use Drupal\Core\Entity\EntityInterface;

use Drupal\Core\Entity\EntityTypeManagerInterface;

use Drupal\Core\Form\FormBase;

use Drupal\Core\Form\FormStateInterface;

  }

  /**

   * {@inheritdoc}

   * Check if user has access to the export form.

   */

  public function access() {

    $parameters = $this->getRouteMatch()->getParameters();

    $entity = $parameters->getIterator()->current();

    if (is_string($entity)) {

      $entity = $parameters->get($entity);

    }

    if (!$entity instanceof EntityInterface) {

      return AccessResult::forbidden();

    }

    $hasAccess = $this->contentSyncHelper->access($entity);

    return $hasAccess ? AccessResult::allowed() : AccessResult::forbidden();