Fatal error: Uncaught Error: Interface "SebastianBergmann\Diff\LCS\LongestCommonSubsequence" not found in C:\mywamp\sites\allsite\calcomposer\vendor\sebastian\diff\src\LCS\TimeEfficientLongestCommonSubsequenceImplementation.php:16 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\sebastian\diff\src\LCS\TimeEfficientLongestCommonSubsequenceImplementation.php on line 16