Fatal error: Uncaught Error: Class 'Drupal\Component\EventDispatcher\Event' not found in /home/vhosts/curie.fr/www/core/lib/Drupal/Core/Http/KernelEvent.php:20 Stack trace: #0 /home/vhosts/curie.fr/vendor/composer/ClassLoader.php(571): include() #1 /home/vhosts/curie.fr/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile('/home/vhosts/cu...') #2 [internal function]: Composer\Autoload\ClassLoader->loadClass('Drupal\\Core\\Htt...') #3 [internal function]: spl_autoload_call('Drupal\\Core\\Htt...') #4 /home/vhosts/curie.fr/www/core/includes/bootstrap.inc(134): class_alias('Drupal\\Core\\Htt...', 'Symfony\\Compone...', true) #5 /home/vhosts/curie.fr/vendor/composer/autoload_real.php(82): require('/home/vhosts/cu...') #6 /home/vhosts/curie.fr/vendor/composer/autoload_real.php(65): composerRequire126337fb1521dc62b5e84e72854a9c87('2f69d3914119f04...', '/home/vhosts/cu...') #7 /home/vhosts/curie.fr/vendor/autoload.php(7): ComposerAutoloaderInit126337fb1521dc62b5e84e72854a9c87::getLoader() #8 /home/vhosts/curie.fr/w in /home/vhosts/curie.fr/www/core/lib/Drupal/Core/Http/KernelEvent.php on line 20