Fatal error: Uncaught Error: Class "Drupal\search\Form\SearchPageFormBase" not found in /home/qcsvlel/www/core/modules/search/src/Form/SearchPageEditForm.php:12 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/search/src/Form/SearchPageEditForm.php on line 12