Fatal error: Uncaught Error: Class "Drupal\Core\Menu\LocalActionDefault" not found in /home/www/drupal8/test/core/modules/block_content/src/Plugin/Menu/LocalAction/BlockContentAddLocalAction.php:12 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/block_content/src/Plugin/Menu/LocalAction/BlockContentAddLocalAction.php on line 12