solved : Class constructor MongoStore cannot be invoked without 'new'

Solved : Class constructor MongoStore cannot be invoked without 'new' Above screenshot you can see what is the problem , Solution : follow this code and fix this problem. this type Error is showing because of we using old way to create session and storing in database . see this is guide . you have to use this for require: const MongoStore = require ( 'connect-mongo' ); and Now use this as store data and create session : // session for save in cart app. use ( session ({ secret: process.env.COOKIE_KEY, // database url resave: false , saveUninitialized: false , cookie: {maxAge: 1000 * 60 * 60 * 24 }, // 24 hours ...