Fatal error: Uncaught Error: Class "Tests\AbstractTestCaseWithOldNow" not found in C:\xampp\htdocs\r10csm\vendor\nesbot\carbon\tests\CarbonInterval\MacroTest.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10csm\vendor\nesbot\carbon\tests\CarbonInterval\MacroTest.php on line 21