Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in D:\Apache24\www\baojie\back\vendor\symfony\http-kernel\DataCollector\ExceptionDataCollector.php:23 Stack trace: #0 {main} thrown in D:\Apache24\www\baojie\back\vendor\symfony\http-kernel\DataCollector\ExceptionDataCollector.php on line 23