Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\print\vendor\symfony\http-foundation\Tests\Session\Storage\MockFileSessionStorageTest.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print\vendor\symfony\http-foundation\Tests\Session\Storage\MockFileSessionStorageTest.php on line 24