Fatal error: Uncaught Error: Interface "SebastianBergmann\Diff\LongestCommonSubsequenceCalculator" not found in /home/grouugah/learning.group-awd.org/vendor/sebastian/diff/src/TimeEfficientLongestCommonSubsequenceCalculator.php:17 Stack trace: #0 {main} thrown in /home/grouugah/learning.group-awd.org/vendor/sebastian/diff/src/TimeEfficientLongestCommonSubsequenceCalculator.php on line 17