Fatal error: Uncaught Error: Class "Drupal\search\Plugin\SearchPluginBase" not found in /home/qcsvlel/www/core/modules/user/src/Plugin/Search/UserSearch.php:24 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/user/src/Plugin/Search/UserSearch.php on line 24