Fatal error: Uncaught Error: Interface 'Symfony\Component\HttpKernel\CacheWarmer\WarmableInterface' not found in /mnt/volume_lon1_01/backend/admin/vendor/symfony/http-kernel/CacheWarmer/CacheWarmerInterface.php:19 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/symfony/http-kernel/CacheWarmer/CacheWarmerInterface.php on line 19