Fatal error: Uncaught Error: Class "App\Backend\Handlers\ErrorResponseEmitter" not found in /app/src/Slim/Handlers/ShutdownHandler.php:71 Stack trace: #0 [internal function]: App\Slim\Handlers\ShutdownHandler->__invoke() #1 {main} thrown in /app/src/Slim/Handlers/ShutdownHandler.php on line 71