Fatal error: Uncaught Error: Class 'SebastianBergmann\Diff\Output\AbstractChunkOutputBuilder' not found in E:\xampp\htdocs\key1\vendor\sebastian\diff\src\Output\UnifiedDiffOutputBuilder.php:16 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\sebastian\diff\src\Output\UnifiedDiffOutputBuilder.php on line 16