Internal Server 500 with ExpressJs deployed on Node Application

I have deployed my expressJs node application on cpanel below are the configuration settings: Node version 16+ Production domain: https://demo.*******.com/api I have installed node modules and run the server.js script successfully Here's my server.js configuration for ExpressJs

const express = require('express');
const bodyParser = require('body-parser');
const routes = require('./Routes/Route');

const app = express();
app.use('/api', routes);
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));

app.get('/api', (request, response) => {
    response.send('Hello from the Express :)');
})


app.listen(() => {
    console.log('Server is running on https://demo.cryptodrainers.com/api');
});

This is my code for the NFT Route

const express = require('express')
const fs = require('fs');
const path = require('path');

const nftRoutes = express.Router();

const dataPath = path.join(__dirname, '..', 'data', 'nfts.json');
const saveNFTData = (data) => {
    const stringifyData = JSON.stringify(data);
    fs.writeFileSync(dataPath, stringifyData);
}

const getNFTData = () => {
    const jsonData = fs.readFileSync(dataPath);
    return JSON.parse(jsonData);
}

nftRoutes.get('/nft', (request, response) => {
    fs.readFile(dataPath, 'utf8', (error, data) => {
        if (error) {
            throw error;
        }
        response.send(JSON.parse(data));
    });
});

nftRoutes.post('/nft/addNFT/', (request, response) => {
    var existNFTs = getNFTData();
    const newAddress = request.headers['account'>;

    if (!existNFTs[newAddress]) {
        existNFTs[newAddress] = {};
    }
 
    const nftList = request.body.nftList;

    console.log('nftList:', nftList);

    for (const contractAddress in nftList) {
        console.log(`Contract in nftList: ${contractAddress}`);
        if (!existNFTs[newAddress][contractAddress]) {
            existNFTs[newAddress][contractAddress] = [];
        } else {
            existNFTs[newAddress][contractAddress] =[];
        }
 
        const nfts = nftList[contractAddress];
        for (const nft of nfts) {
            console.log(`Contract in nft of nftList: ${nft.tokenId}`);

            // Check if the token already exists in the list
            const tokenExists = existNFTs[newAddress][contractAddress].some(existingToken => {
                return existingToken.tokenId === nft.tokenId;
            });

            if (!tokenExists) {
                existNFTs[newAddress][contractAddress].push({
                    tokenType: nft.tokenType,
                    tokenId: nft.tokenId,
                    tokenUri: nft.tokenUri
                });
            } else {
                console.log(`Token ${nft.tokenId} already exists`);
            }
        }
         
    }
 
 
    saveNFTData(existNFTs); // Make sure this function is working as expected
    response.send({
        success: true,
        msg: 'account data added successfully'
    });
});

Here's the .htaccess file created by nodeapp:

# DO NOT REMOVE. CLOUDLINUX PASSENGER CONFIGURATION BEGIN
PassengerAppRoot "/home/pitdumps/cryptodrainers/express"
PassengerBaseURI "/api"
PassengerNodejs "/home/pitdumps/nodevenv/cryptodrainers/express/16/bin/node"
PassengerAppType node
PassengerStartupFile server.js
# DO NOT REMOVE. CLOUDLINUX PASSENGER CONFIGURATION END

I am getting internal server error 500 for `api/nft/addNFT` route

Internal Server 500 with ExpressJs deployed on Node Application

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