[TypeError: Cannot read property 'start' of undefined] on Mac

After I run npm install and npm run hot-server, npm run start-hot fails with the below; what am I doing wrong? Thank you

ericat ~/electron-react-boilerplate $ npm run start-hot

> electron-react-boilerplate@0.7.1 start-hot /Users/ericat/electron-react-boilerplate
> cross-env HOT=1 NODE_ENV=development electron ./

App threw an error when running [TypeError: Cannot read property 'start' of undefined]

[EduardoSantos7]

In my case the solution appears after check the python-shell official documentation. ‘electron’ is correct and be sure to pass run function all the parameters that the function needs (following some tutorials, I was not writting arguments: options) also be sure to write correctly PythonShell

const { app, BrowserWindow } = require('electron')

let { PythonShell } = require('python-shell')

PythonShell.run('hello.py', null, function (err, results) {
    if (err) throw err;
    console.log('hello.py finished.');
    console.log('results', results);
});

Hope be useful!

[MichaelIT]

I got same error as @Ericat ,it worked after I just run npm run dev in iterm instead of atom terminal plugin.

https://github.com/electron/electron-quick-start/issues/113