Fatal error: Uncaught Error: Interface 'Whoops\Handler\HandlerInterface' not found in /mnt/volume_lon1_01/backend/admin/vendor/filp/whoops/src/Whoops/Handler/Handler.php:15 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/filp/whoops/src/Whoops/Handler/Handler.php on line 15