Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\r10ca\vendor\symfony\http-foundation\Tests\Session\Storage\Proxy\SessionHandlerProxyTest.php:28 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10ca\vendor\symfony\http-foundation\Tests\Session\Storage\Proxy\SessionHandlerProxyTest.php on line 28