Fatal error: Uncaught Error: Class "SebastianBergmann\Diff\Output\AbstractChunkOutputBuilder" not found in /home/winnie/public_html/yahya/app-scheduler/vendor/sebastian/diff/src/Output/UnifiedDiffOutputBuilder.php:27 Stack trace: #0 {main} thrown in /home/winnie/public_html/yahya/app-scheduler/vendor/sebastian/diff/src/Output/UnifiedDiffOutputBuilder.php on line 27