Fatal error: Uncaught Error: Interface "Symfony\Component\HttpKernel\HttpKernelInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\http-kernel\HttpKernel.php:53 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\http-kernel\HttpKernel.php on line 53