In the controller/jobs.js -> showStats When I try this code from the course it is not working for the new Mongoose version "mongoose": "^8.5.2": ```js const showStats = async (req, res) => { let stats = await Job.aggregate([ { $match: { createdBy: new mongoose.Types.ObjectId(req.user.userId) } }, { $group: { _id: '$status', count: { $sum: 1 } } }, ]) console.log(stats) res.status(StatusCodes.OK).json({ defaultStats: {}, monthlyApplications: [] }) } ``` This is the issue from my console:  When you try the suggestion using the `new ` it will work but there will be some deprecation warnings:  To solve the issue what I did is to use the string interpolation to make sure that I am passing a string.  Of course, if you're not using the new version of Node and Mongoose, this might not work for you.