Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\RouterDataCollector" not found in /var/www/html/vendor/symfony/framework-bundle/DataCollector/RouterDataCollector.php:23 Stack trace: #0 {main} thrown in /var/www/html/vendor/symfony/framework-bundle/DataCollector/RouterDataCollector.php on line 23