Fatal error: Uncaught Error: Class "SebastianBergmann\Diff\Output\AbstractChunkOutputBuilder" not found in /home/helpdatafirst/public_html/helpappold/vendor/sebastian/diff/src/Output/UnifiedDiffOutputBuilder.php:28 Stack trace: #0 {main} thrown in /home/helpdatafirst/public_html/helpappold/vendor/sebastian/diff/src/Output/UnifiedDiffOutputBuilder.php on line 28