ERROR while initiating the getStudent on client application: Unexpected end og JSON input

3_getStudent.js

'use strict';

/**
 * This is a Node.JS application to fetch a Student Account from network
 * Defaults:
 * StudentID: 0001
 */

const helper = require('./contractHelper');

async function main(studentId) {

	try {
		const certnetContract = await helper.getContractInstance();

		console.log('.....Get Student Account');
		const studentBuffer = await certnetContract.submitTransaction('getStudent', studentId);

		// process response
		console.log('.....Processing Get Student Transaction Response\n\n');
		let existingStudent = JSON.parse(studentBuffer.toString());
		console.log(existingStudent);
		console.log('.....Get Student Transaction Complete!');
    return existingStudent;

	} catch (error) {

		console.log(`\n\n ${error} \n\n`);
    throw new Error(error);

	} finally {

		// Disconnect from the fabric gateway
		helper.disconnect();

	}
}

main('200').then(() => {

	console.log('.....API Execution Complete!');

});

contractHelper.js

const fs = require('fs');
const yaml = require('js-yaml');
const { FileSystemWallet, Gateway } = require('fabric-network');
let gateway;


async function getContractInstance() {

	// A gateway defines which peer is used to access Fabric network
	// It uses a common connection profile (CCP) to connect to a Fabric Peer
	// A CCP is defined manually in file connection-profile-mhrd.yaml
	gateway = new Gateway();

	// A wallet is where the credentials to be used for this transaction exist
	// Credentials for user MHRD_ADMIN was initially added to this wallet.
	const wallet = new FileSystemWallet('./identity/mhrd');

	// What is the username of this Client user accessing the network?
	const fabricUserName = 'MHRD_ADMIN';

	// Load connection profile; will be used to locate a gateway; The CCP is converted from YAML to JSON.
	let connectionProfile = yaml.safeLoad(fs.readFileSync('./connection-profile-mhrd.yaml', 'utf8'));

	// Set connection options; identity and wallet
	let connectionOptions = {
		wallet: wallet,
		identity: fabricUserName,
		discovery: { enabled: false, asLocalhost: true }			
	};

	// Connect to gateway using specified parameters
	console.log('.....Connecting to Fabric Gateway');
	await gateway.connect(connectionProfile, connectionOptions);

	// Access certification channel
	console.log('.....Connecting to channel - certificationchannel');
	const channel = await gateway.getNetwork('certificationchannel');

	// Get instance of deployed Certnet contract
	// @param Name of chaincode
	// @param Name of smart contract
	console.log('.....Connecting to Certnet Smart Contract');
	return channel.getContract('certnet', 'org.certification-network.certnet');
}

function disconnect() {
	console.log('.....Disconnecting from Fabric Gateway');
	gateway.disconnect();
}

module.exports.getContractInstance = getContractInstance;
module.exports.disconnect = disconnect;

Debugger Console

/usr/bin/node --inspect-brk=19354 application/3_getStudent.js 
Debugger listening on ws://127.0.0.1:19354/35350cd8-b5a3-45b6-b382-f52484949d86
For help, see: https://nodejs.org/en/docs/inspector
Debugger attached.
.....Connecting to Fabric Gateway                                         contractHelper.js:32



 Error: EISDIR: illegal operation on a directory, read                    3_getStudent.js:28



.....Disconnecting from Fabric Gateway                                    contractHelper.js:47

(node:15603) UnhandledPromiseRejectionWarning: Error: Error: EISDIR: illegal operation on a directory, read
    at main (/home/rohit/workspace/certification-network/application/3_getStudent.js:29:11)                     warning.js:25

(node:15603) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
warning.js:25
(node:15603) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

getStudent() function in the main smart contract

	async getStudent(ctx, studentId, name) {
		// Create the composite key required to fetch record from blockchain
		const studentKey = ctx.stub.createCompositeKey('org.certification-network.certnet.student', [studentId]);
		
		// Return value of student account from blockchain
		let studentBuffer = await ctx.stub
				.getState(studentKey)
				.catch(err => console.log(err));
		let studentbject = JSON.parse(studentBuffer.toString());
		if(studentbject.name === name){
			return studentbject
		}else{
			return console.log('Incorrect Student Name. Please Try Again!');
		}
	}

Terminal Console

rohit@rohit-Swift-SF514-52T:~/workspace/certification-network/application$ node 3_getStudent.js
.....Connecting to Fabric Gateway
.....Connecting to channel - certificationchannel
.....Connecting to Certnet Smart Contract
.....Get Student Account
.....Processing Get Student Transaction Response




 SyntaxError: Unexpected end of JSON input 


.....Disconnecting from Fabric Gateway
(node:16184) UnhandledPromiseRejectionWarning: Error: SyntaxError: Unexpected end of JSON input
    at main (/home/rohit/workspace/certification-network/application/3_getStudent.js:29:11)
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:16184) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:16184) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I am getting an error "Unexpected end of JSON input"

On further performing debugging, the code breaks on line 33 of contractHelper.js (await gateway.connect(connectionProfile, connectionOptions)

It seems like there is some problem in either accessing the wallet or reading the connection-profile-mhrd.yaml file.

Earlier the error during debugging was "unable to access connection-profile-mhrd.yaml" (for some reason the terminal was looking for the file in the main certification-network folder and not the application folder. The problem got resolved somehow (maybe?) and this is the new error "Error: EISDIR: illegal operation on a directory"

Basically IDK what is happening!