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User error: "0" is an invalid render array key in Drupal\Core\Render\Element::children() (line 98 of core/lib/Drupal/Core/Render/Element.php) with Drupal 9.3.9

Open on Drupal.org →
Created on 17 April 2022, over 2 years ago
Updated 2 August 2024, 4 months ago

Problem/Motivation

The error 'User error: "0" is an invalid render array key in Drupal\Core\Render\Element::children() (line 98 of core/lib/Drupal/Core/Render/Element.php)' occures when install with Drupal 9.3.9
The 'attributes' should be replaced with '#attributes' in skeletontheme_preprocess_page(&$variables) function.
The code below works for me.

function skeletontheme_preprocess_page(&$variables) {
  $sidebar_first = !empty($variables['page']['sidebar_first']);
  $sidebar_second = !empty($variables['page']['sidebar_second']);

  if ($sidebar_first) {
    $variables['page']['sidebar_first']['#attributes']['class'][] = 'five columns';
    if ($sidebar_second) {
      $variables['page']['sidebar_second']['#attributes']['class'][] = 'five columns';
      $variables['page']['content']['#attributes']['class'][] = 'six columns';
    }
    else {
      $variables['page']['content']['#attributes']['class'][] = 'eleven columns';
    }
  }
  else {
    if ($sidebar_second) {
      $variables['page']['content']['#attributes']['class'][] = 'eleven columns';
      $variables['page']['sidebar_second']['#attributes']['class'][] = 'five columns';
    }
    else {
      $variables['page']['content']['#attributes']['class'][] = 'sixteen columns';
    }
  }
}
🐛 Bug report
Status

Needs review

Version

1.0

Component

Code

Created by

🇧🇬Bulgaria i.koychev Sofia

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