Error - Call to a member function getTitle() in hook_preprocess_breadcrumb

Fatal error: Call to a member function getTitle() on string in D:\Backup\htdocs\bornbook\themes\news_zymphonies_theme\news_zymphonies_theme.theme on line 283

if(($node = \Drupal::routeMatch()->getParameter('node')) && $variables['breadcrumb']){
$nodeDetails = node_load($node);
$variables['breadcrumb'][] = array(
'text' => $nodeDetails->get('title')->value,
'url' => $nodeDetails->get('url')->value
);
}

instead of

if(($node = \Drupal::routeMatch()->getParameter('node')) && $variables['breadcrumb']){
$variables['breadcrumb'][] = array(
'text' => $node->getTitle(),
'url' => $node->URL()
);
}