Warning: Undefined array key "#markup" in Drupal\Core\Render\RenderCache->getCacheableRenderArray()

With apologies, I do not understand the meaning of this issue. What is a "PFB"?

I have removed PFB,
I am getting warning which I am adding block on login page.

This needs more information. I asked you a question but you did not answer it. Get a stack trace.

Hi @cilefen,

I am using this hook one of my module and it giving me below error

Warning: Undefined array key "#markup" in Drupal\Core\Render\RenderCache->getCacheableRenderArray() (line 333 of D:\xampp\htdocs\project\docroot\core\lib\Drupal\Core\Render\RenderCache.php)

Inside this hook, I am calling a block which created bin OpenID module. which need to be display in custom login page.

I am getting this warning. Need help to resolve the warning

@shrikant.dhotre

Could you please provide the complete steps to reproduce the issue?

Thanks

Hi @Prashan.c,
I have implement below code.

/**
 * Implements hook_block_access().
 *
 * Hide Open ID connect block if Drupal Login form is enabled.
 */
function custom_module_block_access(Block $block, $operation, AccountInterface $account) {
  $drupalLogin = \Drupal::state()->get('drupal_login_active');
  if ($drupalLogin && $block->id() == 'openidconnectlogin_3' && $operation == 'view') {
    return AccessResult::forbiddenIf(TRUE)->addCacheableDependency($block);
  }
}

Instead of id() would check the pluginId.

Instead of forbiddenIf would just use Forbidden since TRUE isn't a condition.

Also may have to dig into the logs some more to see what is calling markup.

I got the same issue while trying to limit logins to my main "Domain Access" domain name.

The code we're trying to implement :

/**
 * Implements hook_form_alter().
 */
function domain_login_disable_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == 'user_login_form') {
    /** @var \Drupal\domain\Entity\Domain $active */
    $active = \Drupal::service('domain.negotiator')->getActiveDomain();

    if (is_null($active)) {
      $active = \Drupal::entityTypeManager()->getStorage('domain')->loadDefaultDomain();
    }

    if (is_null($active)) {
      // If there's an issue with domain, we won't block the login form.
      return;
    }

    if (!$active->isDefault()) {
      $form['#access'] = FALSE;
    }
  }
}

When going trough a page request with Xdebug, we can see that in core/lib/Drupal/Core/Render/RenderCache.php, in the getCacheableRenderArray() function, the $elements array doesn't have a #markup element.

Adding $form['#markup'] = NULL; in our function right after we set #access to FALSE fix the issue.

Is it an intended behavior?

I am having this problem too on a fresh new installation of Drupal 10, the error prevents the rendering of the new user creation form. It only appears there.