Fatal error: Uncaught Error: Class "Symfony\Component\Routing\RouteCollection" not found in C:\Apache24_x64\htdocs\ipad\vendor\symfony\routing\Tests\Fixtures\validpattern.php:6 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\symfony\routing\Tests\Fixtures\validpattern.php on line 6