Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\r10csm\vendor\fruitcake\php-cors\tests\CorsTest.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10csm\vendor\fruitcake\php-cors\tests\CorsTest.php on line 23