Fatal error: Uncaught Error: Class "SebastianBergmann\Diff\Output\AbstractChunkOutputBuilder" not found in /media/jean/learning/huagai/drupal/vendor/sebastian/diff/src/Output/UnifiedDiffOutputBuilder.php:29 Stack trace: #0 {main} thrown in /media/jean/learning/huagai/drupal/vendor/sebastian/diff/src/Output/UnifiedDiffOutputBuilder.php on line 29