Fatal error: Uncaught Error: Class "Drupal\Core\Field\WidgetBase" not found in /home/qcsvlel/www/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php:24 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php on line 24