Fatal error: Uncaught Error: Class "Drupal\Core\Field\FormatterBase" not found in /home/qcsvlel/www/core/modules/file/src/Plugin/Field/FieldFormatter/FileSize.php:21 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/file/src/Plugin/Field/FieldFormatter/FileSize.php on line 21