Fatal error: Uncaught Error: Class "Drupal\block_content\Plugin\migrate\source\d7\BlockCustomTranslation" not found in /home/qcsvlel/www/core/modules/block_content/src/Plugin/migrate/source/d6/BoxTranslation.php:20 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/block_content/src/Plugin/migrate/source/d6/BoxTranslation.php on line 20