Fatal error: Uncaught Error: Class 'Symfony\Component\Routing\RouteCollection' not found in C:\xampp\htdocs\print-bk\vendor\symfony\routing\Tests\Fixtures\validpattern.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print-bk\vendor\symfony\routing\Tests\Fixtures\validpattern.php on line 6