I can connect to google cloud deployed by mongoDB from the local host, but not from the same application when deployed in the application engine

Question

My application is written in React and Express using Mongoose for db. I deployed a bitnami mongoDB instance in the Google Compute Engine. Now I am trying to deploy the server in the application. When I run my application locally, it connects perfectly to db (I can add stuff and see it). But when I run npm in the google cloud shell, we get this error:

'failed to connect to server [35.196.182.249:27017] on first connect [MongoError: connection 0 to 35.196.182.249:27017 timed out]' }
(node:1310) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): MongoError: failed to connect to server [35.196.182.249:27017] on first connect [MongoError: connection 0 to 35.196.182.249:27017 timed out]

Here is my connection code:

mongoose.connect(process.env.MONGODB_URI,{
    useMongoClient: true
}).catch(function(err){
    console.log(err)
});

MONGODB_URI=mongodb://root:[e-mail]:27017,  password - , , XX.XXX.XXX.XXX - IP-, .   URI Google, localhost. URI, . ?