Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\print\vendor\symfony\console\Tests\Output\ConsoleSectionOutputTest.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print\vendor\symfony\console\Tests\Output\ConsoleSectionOutputTest.php on line 23