Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\symfony\http-kernel\DataCollector\DumpDataCollector.php:32 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\symfony\http-kernel\DataCollector\DumpDataCollector.php on line 32