I am working for a Backend application, When I am testing with Thunder Client data is not coming by id

Here is the screenshot

Error is

[nodemon] starting `node server.js`
Database Connected
I'm listening on port 4000
TypeError: Converting circular structure to JSON
    --> starting at object with constructor 'MongoClient'
    |     property 's' -> object with constructor 'Object'
    |     property 'sessionPool' -> object with constructor 'ServerSessionPool'
    --- property 'client' closes the circle
    at JSON.stringify (<anonymous>)
    at stringify (D:servernode_modulesexpresslibresponse.js:1159:12)
    at ServerResponse.json (D:servernode_modulesexpresslibresponse.js:272:14)
    at getUserById (D:servercontrollerusers.js:27:32)   
    at Layer.handle [as handle_request] (D:servernode_modulesexpresslibrouterlayer.js:95:5)
    at next (D:servernode_modulesexpresslibrouterroute.js:149:13)
    at Route.dispatch (D:servernode_modulesexpresslibrouterroute.js:119:3)
    at Layer.handle [as handle_request] (D:servernode_modulesexpresslibrouterlayer.js:95:5)
    at D:servernode_modulesexpresslibrouterindex.js:284:15
    at param (D:servernode_modulesexpresslibrouterindex.js:365:14)

controllerusers.js

const getUserById =  (req, res, next) => {
    const userId = req.params.userId;

    try {
        const user =  userService.findUserByProperty('_id', userId)
        if (!user) {
            throw error('User not found', 404)
        }

          return res.status(200).json(user);
    } catch (e) {
        next(e)
    }
};

I tested the whole with so many id & parameters and changed those id & parameters, but the problem is the same