Error listening onData while executing a program using node-pty

Question

Hello I have been trying to write a remote compiler using node-pty. Basic logic is if my client socket gets an event with language and source code from front end application. First I check for the language and then create a directory in current working directory. Then create a file and append source code in it, save it using random name. Try to compile using node-pty and send the result back.

Here is source,

const { io } = require('socket.io-client');
const terminal = require('node-pty');
const os = require('os');
const fs = require('fs')


const socket = io('http://192.168.1.13:4805');

socket.on(`${os.hostname()}_compile`, (data) => {
    if (data.language === "py") {
        try {
            // Generate random string of length 10
            const randomString = Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);
            // get current working directory to store the file
            const cwd = process.cwd();
            // create directory named 'py' if not exists
            if (!fs.existsSync(`${cwd}/py`)) {
                fs.mkdirSync(`${cwd}/py`);
            }
            fs.writeFileSync(`${cwd}/py/${randomString}.py`, data.code);

            // execute the file
            const pty = terminal.spawn('powershell.exe', [], {
                name: 'xterm-color',
                cols: 80,
                rows: 30,
                cwd: `${cwd}/py`,
                env: process.env
            });

            pty.write(`python ${cwd}/py/${randomString}.py \r`);

            pty.onData('data', (out) => {
                
                console.log('Must be problem with only out');
                //console.log(out);
                /*socket.emit(`compile_result`, {
                    out: out,
                    language: data.language,
                });*/
                //pty.kill();
            });

            pty.onExit((code) => {
                fs.unlinkSync(`${cwd}/py/${randomString}.py`);
            });

            pty.write('ls\r')



        } catch (error) {
            console.log("Throwing : " + error);

            const errorEmit = {
                'source': os.hostname(),
                'error': 'Error in writing file'
            };

            socket.emit('error', errorEmit);
        }
    }
    else if (data.language === "c") {}
    else if (data.language === "cpp") {}
    else if (data.language === "java") {}
});

I am getting error exactly on

            pty.onData('data', (out) => {

               
                console.log(out);
                /*socket.emit(`compile_result`, {
                    out: out,
                    language: data.language,
                });*/
                //pty.kill();
            });

error log as follows

D:\Website\Dunix\containers\compiler\compiler-node\node_modules\node-pty\lib\eventEmitter2.js:40
            queue[i].call(undefined, data);
                     ^

TypeError: queue[i].call is not a function
    at EventEmitter2.fire (D:\Website\Dunix\containers\compiler\compiler-node\node_modules\node-pty\lib\eventEmitter2.js
:40:22)
    at Socket.<anonymous> (D:\Website\Dunix\containers\compiler\compiler-node\node_modules\node-pty\lib\terminal.js:85:6
1)
    at Socket.emit (node:events:532:35)
    at addChunk (node:internal/streams/readable:315:12)
    at readableAddChunk (node:internal/streams/readable:285:11)
    at Socket.Readable.push (node:internal/streams/readable:228:10)
    at Pipe.onStreamRead (node:internal/stream_base_commons:190:23)
[nodemon] app crashed - waiting for file changes before starting...

is there anything I am doing wrong ?