Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in D:\Apache24\www\hl_eis-new\vendor\symfony\http-kernel\DataCollector\AjaxDataCollector.php:22 Stack trace: #0 {main} thrown in D:\Apache24\www\hl_eis-new\vendor\symfony\http-kernel\DataCollector\AjaxDataCollector.php on line 22