Fatal error: Uncaught Error: Interface "Symfony\Component\HttpKernel\HttpKernelInterface" not found in /var/www/html/docroot/core/lib/Drupal/Core/DrupalKernelInterface.php:16 Stack trace: #0 /var/www/html/vendor/composer/ClassLoader.php(576): include() #1 /var/www/html/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/var/www/html/v...') #2 /var/www/html/docroot/core/lib/Drupal/Core/DrupalKernel.php(52): Composer\Autoload\ClassLoader->loadClass('Drupal\\Core\\Dru...') #3 /var/www/html/vendor/composer/ClassLoader.php(576): include('/var/www/html/d...') #4 /var/www/html/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}('/var/www/html/v...') #5 /var/www/html/docroot/index.php(16): Composer\Autoload\ClassLoader->loadClass('Drupal\\Core\\Dru...') #6 {main} thrown in /var/www/html/docroot/core/lib/Drupal/Core/DrupalKernelInterface.php on line 16