$absolute_url = $url->setAbsolute()->toString();
$cid_parts = [$absolute_url, 'html'];
$cid = implode(':', $cid_parts);
- $cache_entry = \Drupal::cache('render')->get($cid);
+ $cache_entry = \Drupal::cache('page')->get($cid);
sort($cache_entry->tags);
$tags = array_unique($tags);
sort($tags);