Warning: Class "Drupal\Core\Http\KernelEvent" not found in /var/www/www.unido.org/web/core/includes/bootstrap.inc on line 135

Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\Request" not found in /var/www/www.unido.org/web/core/includes/bootstrap.inc:142 Stack trace: #0 /var/www/www.unido.org/vendor/composer/autoload_real.php(45): require() #1 /var/www/www.unido.org/vendor/composer/autoload_real.php(49): {closure}('2f69d3914119f04...', '/var/www/www.un...') #2 /var/www/www.unido.org/vendor/autoload.php(25): ComposerAutoloaderInit394778589e87485312f16161e8bd4571::getLoader() #3 /var/www/www.unido.org/web/autoload.php(16): require('/var/www/www.un...') #4 /var/www/www.unido.org/web/index.php(14): require_once('/var/www/www.un...') #5 {main} thrown in /var/www/www.unido.org/web/core/includes/bootstrap.inc on line 142