Fatal error: Uncaught Error: Interface "Symfony\Component\HttpKernel\HttpKernelInterface" not found in /home/piffaqvc/my.piffersoftware.com/vendor/symfony/http-kernel/HttpCache/HttpCache.php:31 Stack trace: #0 {main} thrown in /home/piffaqvc/my.piffersoftware.com/vendor/symfony/http-kernel/HttpCache/HttpCache.php on line 31