Additional uncaught exception thrown while handling exception.

Original

Error: Class 'Drupal\Core\DependencyInjection\Compiler\ModifyServiceDefinitionsPass' not found in Drupal\Core\CoreServiceProvider->register() (line 66 of /web/htdocs/www.buonaseraroma.it/home/core/lib/Drupal/Core/CoreServiceProvider.php).

Drupal\Core\CoreServiceProvider->register(Object) (Line: 1309)
Drupal\Core\DrupalKernel->compileContainer() (Line: 916)
Drupal\Core\DrupalKernel->initializeContainer() (Line: 20)
Drupal\Core\Installer\InstallerKernel->initializeContainer() (Line: 477)
Drupal\Core\DrupalKernel->boot() (Line: 433)
install_begin_request(Object, Array) (Line: 114)
install_drupal(Object) (Line: 44)

Additional

Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: You have requested a non-existent service "theme.manager". in Symfony\Component\DependencyInjection\ContainerBuilder->getDefinition() (line 1060 of /web/htdocs/www.buonaseraroma.it/home/vendor/symfony/dependency-injection/ContainerBuilder.php).

Symfony\Component\DependencyInjection\ContainerBuilder->getDefinition('theme.manager') (Line: 620)
Symfony\Component\DependencyInjection\ContainerBuilder->doGet('theme.manager', 1) (Line: 588)
Symfony\Component\DependencyInjection\ContainerBuilder->get('theme.manager') (Line: 693)
Drupal::theme() (Line: 22)
_drupal_maintenance_theme() (Line: 753)
drupal_maintenance_theme() (Line: 1028)
install_display_output(Array, Array, Array) (Line: 267)
_drupal_log_error(Array, 1) (Line: 618)
_drupal_exception_handler(Object)