Estoy creando el sitio web de comercio electrónico MERN STACK y recibo el error anterior cuando registro un nuevo usuario. El error apunta a este fragmento de código: en middleware/error.js que dice "Código de estado no válido: indefinido"

A continuación se muestra el error.js en /middleware/error

 module.exports = (err, req, res, next) => { err.statusCode = err.statusCode || 500; err.message = err.message || "Internal Server Error"; res.status(err.statusCode).json({ success: false, message: err.message, }); };

Este es el código completo en mi app.js

 const express = require("express"); const app = express(); const cookieParser = require("cookie-parser"); const bodyParser = require("body-parser"); const fileUpload = require("express-fileupload"); const errorMiddleware = require("./middleware/error"); app.use(express.json()); app.use(cookieParser()); app.use(bodyParser.urlencoded({ extended: true })); app.use(fileUpload()); // Route Imports const product = require("./routes/productRoute"); const user = require("./routes/userRoute"); const order = require("./routes/orderRoute"); app.use("/api/v1", product); app.use("/api/v1", user); app.use("/api/v1", order); // Middleware for Errors app.use(errorMiddleware); module.exports = app;

Este es el backend donde ocurrió el error

 Ranjeet@Home MINGW64 ~/Desktop/projects/ecommerce/backend $ npm run dev > mernecommerce@1.0.0 dev > nodemon backend/server.js [nodemon] 2.0.16 [nodemon] to restart at any time, enter `rs` [nodemon] watching path(s): *.* [nodemon] watching extensions: js,mjs,json [nodemon] starting `node backend/server.js` Server is working on http://localhost:4000 Mongodb connected with server: localhost RangeError [ERR_HTTP_INVALID_STATUS_CODE]: Invalid status code: undefined at new NodeError (node:internal/errors:371:5) at ServerResponse.writeHead (node:_http_server:274:11) at ServerResponse._implicitHeader (node:_http_server:265:8) at write_ (node:_http_outgoing:766:9) at ServerResponse.end (node:_http_outgoing:855:5) at ServerResponse.send (C:\Users\Ranjeet\Desktop\projects\ecommerce\node_modules\express\lib\response.js:221:10) at ServerResponse.json (C:\Users\Ranjeet\Desktop\projects\ecommerce\node_modules\express\lib\response.js:267:15) at module.exports (C:\Users\Ranjeet\Desktop\projects\ecommerce\backend\middleware\error.js:33:30)