Fatal error: Uncaught Error: Interface "Drupal\Component\Plugin\Discovery\DiscoveryInterface" not found in /home/www/drupal8/test/core/modules/layout_builder/src/SectionStorage/SectionStorageManagerInterface.php:15 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/layout_builder/src/SectionStorage/SectionStorageManagerInterface.php on line 15