Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DataCollector\DataCollector' not found in /opt/lampp/htdocs/us/vendor/symfony/http-kernel/DataCollector/RouterDataCollector.php:22 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/us/vendor/symfony/http-kernel/DataCollector/RouterDataCollector.php on line 22