Fatal error: Uncaught Error: Class "Drupal\views\Plugin\views\argument\Date" not found in /home/www/drupal8/test/core/modules/datetime/src/Plugin/views/argument/Date.php:26 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/datetime/src/Plugin/views/argument/Date.php on line 26