Fatal error: Uncaught Error: Class "Drupal\Core\Condition\ConditionPluginBase" not found in /home/www/drupal8/test/core/modules/system/src/Plugin/Condition/RequestPath.php:22 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/system/src/Plugin/Condition/RequestPath.php on line 22