Fatal error: Uncaught Error: Class "Whoops\TestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\filp\whoops\tests\Whoops\Exception\FrameCollectionTest.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\filp\whoops\tests\Whoops\Exception\FrameCollectionTest.php on line 11