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Fatal error: Uncaught Error: Class "Drupal\Component\EventDispatcher\Event" not found in /var/www/html/lyonfr/repository/web/core/lib/Drupal/Core/Http/KernelEvent.php:20 Stack trace: #0 /var/www/html/lyonfr/repository/vendor/composer/ClassLoader.php(576): include() #1 /var/www/html/lyonfr/repository/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}() #2 [internal function]: Composer\Autoload\ClassLoader->loadClass() #3 /var/www/html/lyonfr/repository/web/core/includes/bootstrap.inc(135): class_alias() #4 /var/www/html/lyonfr/repository/vendor/composer/autoload_real.php(45): require('...') #5 /var/www/html/lyonfr/repository/vendor/composer/autoload_real.php(49): {closure}() #6 /var/www/html/lyonfr/repository/vendor/autoload.php(25): ComposerAutoloaderInit11304fd1e1644a67654c9045a6aef506::getLoader() #7 /var/www/html/lyonfr/repository/web/autoload.php(16): require('...') #8 /var/www/html/lyonfr/repository/web/index.php(14): require_once('...') #9 {main} thrown in /var/www/html/lyonfr/repository/web/core/lib/Drupal/Core/Http/KernelEvent.php on line 20