Ошибка развертывания rest-API без сервера

Question

ОШИБКА ВНУТРЕННЕГО СЕРВЕРА {"message": "Внутренняя ошибка сервера"}

sls deploy работает, однако эта ошибка отображается ????. Есть ли что-то, что мне нужно сделать, чтобы решить проблему

    Gauravs-MacBook-Pro:project gaurav$ sls deployServerless: Packaging service...
    Serverless: Excluding development dependencies...
    Serverless: Service files not changed. Skipping deployment...
    Service Information
    service: rest-api
    stage: dev
    region: us-east-1
    stack: rest-api-dev
    resources: 11
    api keys:
      None
    endpoints:
      ANY - https://i68nn2gf71.execute-api.us-east-1.amazonaws.com/dev
      ANY - https://i68nn2gf71.execute-api.us-east-1.amazonaws.com/dev/{proxy+}
    functions:
      app: rest-api-dev-app
    layers:
      None

https://dev.to/saigowthamr/build-and-deploy-a-rest-api--using-serverless-express-and-nodejs-3331 Придерживался руководства по развертыванию rest-api поверх безсерверного сервера, получая сообщение об ошибке внутреннего сервера

    const serverless = require("serverless-http");
    const express = require('express');
    const app = express();
    const morgan = require('morgan');
    const bodyParser = require('body-parser');
    const mongoose = require('mongoose');

    const restaurantRoutes = require("./api/routes/restaurant");
    const itemRoutes = require("./api/routes/items");

    mongoose.connect('mongodb+srv://gaurav:Qwerty%4012345@cluster0-ycxzk.mongodb.net/test?retryWrites=true',
    {
        useNewUrlParser: true
    }
    );

    app.use(morgan('dev'));
    app.use('/uploads',express.static('uploads'));
    app.use(bodyParser.urlencoded({extended: false, UrlParser: true}));
    app.use(bodyParser.json());

    app.use((req,res,next) => {
       res.header('Access-Control-Allow-Origin', "*");
       res.header( "Origin, X-Requested-With, Content-Type, Accept, Authorization");
       if(req.method === 'OPTIONS'){
           res.header('Access-Control-Allow-Methods', 'PUT, POST, PATCH, DELETE, GET');
           return res.status(200).json({});
       }
       next();
    });
    //routes which should handle requests 


     app.use('/restaurant', restaurantRoutes);


    const multer = require('multer');



    const storage = multer.diskStorage({
        destination : function(req, file, cb){
            cb(null, './uploads/');
        },
        filename : function(req ,file,cb){
            cb(null, new Date().toISOString() + file.originalName);
        }
    });
    const fileFilter = (req, file, cb) => {
        //reject a file
        if(file.mimetype === 'image/jpeg' || file.mimeType == 'image.png'){
        cb(null,true);
    }
    else{
        cb(null,false);
    }

    };

    const upload = multer({
        storage: storage, 
        limits:{
        fileSize: 1024 * 1024 *5
    },
    fileFilter :fileFilter
    });


    const Restaurant = require('./api/models/Restaurant');

    // Handling incoming get requests to /order
    app.get("/restaurant", function(req,res,next) {
        Restaurant.find().exec()
        .then(docs =>{
            console.log(docs);
            res.status(200).json(docs);
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error: err
            });
        });
    });
    app.post("/restaurant", upload.single('productImage') , function(req,res,next)  {
       console.log(req.file);
        const restaurant = new Restaurant({
            _id: new mongoose.Types.ObjectId(),
            name: req.body.name,
            cuisine: req.body.cuisine,
            location: req.body.location,
            latitude: req.body.latitude,
            longitude:req.body.longitude,
            allergies:req.body.allergies,
            // productImage: req.file.path

        });
        restaurant.save().then(result => {
            console.log(result);
        })
        .catch(err => console.log(err));
        res.status(200).json({
            message: 'Handle Restaurants ',
            createdRestaurant: restaurant
        });
    });
    app.get("/restaurant/:restaurantId", function(req,res,next) {
        const id = req.params.restaurantId;

        Restaurant.findById(id)
        .exec()
        .then(doc => {
            console.log(doc);
            res.status(200).json(doc);
        })
        .catch(err =>  {
            console.log(err);
            res.status(500).json({error :err});
        });
    });


    app.patch('/restaurant/:restaurantId', upload.single('productImage') ,function(req,res,next) {
        const id = req.params.restaurantId;
        const updateOps = {};
        for(const ops of req.body){
            updateOps[ops.propName] = ops.value;
        }
        Restaurant.update({ _id :id}, {$set: updateOps})
        .exec()
        .then (result => {
            console.log(result);
            res.status(200).json(result);
        })
        .catch(err => {
            console.log(err);
            res.status(500).json({
                error:err
            });
        });
    });

    app.delete('/restaurant/:restaurantId', function (req,res,next)  {
        const id = req.params.restaurantId;
        Restaurant.remove({_id:id  }).exec()
        .then(result => {
            res.status(200).json({
                message: 'Product deleted ',
                request: {
                    type : 'POST',
                    url: 'http://localhost3000/restaurant',
                    data :{
                        name: 'String',
                        cuisine: 'String'
                    }
                }
            });
        }).catch(err => {
            res.status(200).json({
                error:err
            });

        }); 
    });
    app.use('/items', itemRoutes);
    app.use('/uploads',express.static('uploads'));
    app.use((req,res,next) => {
        const error = new Error('Not Found');
        error.status =404;
        next(error);
    })

    app.use((error, req, res, next) => {
        res.status(error.status || 500);
        res.json({
            error: {
                message: error.message
            }
        });
    });
    module.exports.handler = serverless(app);