Fatal error: Uncaught Error: Class "SebastianBergmann\Diff\LongestCommonSubsequenceTestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\sebastian\diff\tests\MemoryEfficientImplementationTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\sebastian\diff\tests\MemoryEfficientImplementationTest.php on line 17