Fatal error: Uncaught Error: Interface 'SebastianBergmann\Diff\LongestCommonSubsequenceCalculator' not found in D:\xampp\htdocs\psp\backend\vendor\sebastian\diff\src\TimeEfficientLongestCommonSubsequenceCalculator.php:17 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\sebastian\diff\src\TimeEfficientLongestCommonSubsequenceCalculator.php on line 17