Warning: include(/home/users4/p/pierrefradin/www/drupal8/vendor/composer/../../core/lib/Drupal/Core/DrupalKernel.php): failed to open stream: No such file or directory in /home/users4/p/pierrefradin/www/drupal8/vendor/composer/ClassLoader.php on line 412

Warning: include(): Failed opening '/home/users4/p/pierrefradin/www/drupal8/vendor/composer/../../core/lib/Drupal/Core/DrupalKernel.php' for inclusion (include_path='.:/usr/local/lib/ZFramework') in /home/users4/p/pierrefradin/www/drupal8/vendor/composer/ClassLoader.php on line 412

Fatal error: Class 'Drupal\Core\DrupalKernel' not found in /home/users4/p/pierrefradin/www/drupal8/index.php on line 16