Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\nesbot\carbon\tests\Core\Util\Tokens\TokenNameTest.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\nesbot\carbon\tests\Core\Util\Tokens\TokenNameTest.php on line 20