Fatal error: Uncaught Error: Interface "Drupal\Core\PageCache\RequestPolicyInterface" not found in /home/www/drupal8/test/core/modules/basic_auth/src/PageCache/DisallowBasicAuthRequests.php:15 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/basic_auth/src/PageCache/DisallowBasicAuthRequests.php on line 15