Fatal error: Uncaught Error: Class "Drupal\Core\Plugin\DefaultPluginManager" not found in /home/quitpathshareaco/public_html/New/vendor/drupal/core/modules/navigation/src/TopBarItemManager.php:15 Stack trace: #0 {main} thrown in /home/quitpathshareaco/public_html/New/vendor/drupal/core/modules/navigation/src/TopBarItemManager.php on line 15