Fatal error: Uncaught Error: Class "Carbon\CarbonInterval" not found in C:\xampp\htdocs\r10csm\vendor\nesbot\carbon\tests\CarbonInterval\Fixtures\MyCarbonInterval.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10csm\vendor\nesbot\carbon\tests\CarbonInterval\Fixtures\MyCarbonInterval.php on line 18