Fatal error: Uncaught Error: Class "Drupal\Tests\content_translation\Functional\ContentTranslationUITestBase" not found in /home/qcsvlel/www/core/modules/comment/tests/src/Functional/CommentTranslationUITest.php:17 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/comment/tests/src/Functional/CommentTranslationUITest.php on line 17