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