Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\HttpCache\AbstractSurrogate" not found in D:\Apache24\www\qilu_sap\back-end\vendor\symfony\http-kernel\HttpCache\Ssi.php:22 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu_sap\back-end\vendor\symfony\http-kernel\HttpCache\Ssi.php on line 22