Fatal error: Uncaught Error: Class "Drupal\Core\Mail\Plugin\Mail\PhpMail" not found in /home/qcsvlel/www/core/lib/Drupal/Core/Mail/Plugin/Mail/TestMailCollector.php:19 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/lib/Drupal/Core/Mail/Plugin/Mail/TestMailCollector.php on line 19