Fatal error: Uncaught Error: Interface "Drupal\content_translation\FieldTranslationSynchronizerInterface" not found in /home/www/drupal8/test/core/modules/content_translation/src/FieldTranslationSynchronizer.php:14 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/content_translation/src/FieldTranslationSynchronizer.php on line 14