Fatal error: Uncaught Error: Class "Drupal\Core\Field\FieldConfigBase" not found in /home/qcsvlel/www/core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php:55 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php on line 55