Bootstrap issue

I am running a Drupal 8 multisite. All was well until I used Drush to update to the latest version and got a bootstrapping error.   This is the latest error:  /var/www/html/drupal/core/lib/Drupal/Component/DependencyInjection/Container.php(171): DrupalComponentDependencyInjectio” while reading response header from upstream, client: 108.14.88.246, server: , request: “GET /favicon.ico[…]