Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\r10csm\vendor\symfony\routing\Tests\Loader\AttributeDirectoryLoaderTest.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10csm\vendor\symfony\routing\Tests\Loader\AttributeDirectoryLoaderTest.php on line 24