Fatal error: Uncaught Error: Class "Drupal\Component\Plugin\Definition\PluginDefinition" not found in /home/qcsvlel/www/core/modules/ckeditor5/src/Plugin/CKEditor5PluginDefinition.php:20 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/ckeditor5/src/Plugin/CKEditor5PluginDefinition.php on line 20