Fatal error: Uncaught Error: Class 'Drupal\Core\EventSubscriber\CustomPageExceptionHtmlSubscriber' not found in /home/discovergreece/public_html/vendor/palantirnet/drupal-rector/fixtures/d9/rector_examples/src/EventSubscriber/ExceptionSubscriber.php:9 Stack trace: #0 {main} thrown in /home/discovergreece/public_html/vendor/palantirnet/drupal-rector/fixtures/d9/rector_examples/src/EventSubscriber/ExceptionSubscriber.php on line 9