Fatal error: Uncaught Error: Class 'Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher' not found in /var/www/html/tmp/contrib/devel/webprofiler/src/EventDispatcher/TraceableEventDispatcher.php:14 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/devel/webprofiler/src/EventDispatcher/TraceableEventDispatcher.php on line 14