Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\print\vendor\symfony\console\Tests\CommandLoader\ContainerCommandLoaderTest.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print\vendor\symfony\console\Tests\CommandLoader\ContainerCommandLoaderTest.php on line 19