Fatal error: Uncaught Error: Class "Drupal\Core\Field\BaseFieldDefinition" not found in /home/fnbrshareacopy/public_html/modules/contrib/entity/src/BundleFieldDefinition.php:18 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/entity/src/BundleFieldDefinition.php on line 18