Fatal error: Uncaught Error: Class "Drupal\image\Plugin\ImageEffect\ResizeImageEffect" not found in /home/www/drupal8/test/core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php:18 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php on line 18