React-native connection errors - node.js

Question

I'm trying to start a new project in React Native but I'm getting errors when I try to launch iOS Simulator. I have not edited the index.ios.js. I'm using iOS Simulator to run the project, and the error in the emulator is 'Could not connect to development server...'
Looking for JS files in /Users/jeff/Documents/TestApp
ERROR EACCES, permission denied '/Users/jeff/.babel.json'
{"errno":-13,"code":"EACCES","path":"/Users/jeff/.babel.json","syscall":"open"}
Error: EACCES, permission denied '/Users/jeff/.babel.json'
at Error (native)
at Object.fs.openSync (evalmachine.:500:18)
at Object.fs.writeFileSync (evalmachine.:1099:15)
at save (/Users/jeff/Documents/TestApp/node_modules/react-native/node_modules/babel-core/lib/api/register/cache.js:35:19)
at process._tickCallback (node.js:355:11)
at Function.Module.runMain (module.js:503:11)
at startup (node.js:129:16)
at node.js:814:3
See http://facebook.github.io/react-native/docs/troubleshooting.html
for common problems and solutions. evalmachine.:565
fs.write = function(fd, buffer, offset, length, position, callback) {
^ Error: EACCES, permission denied '/Users/jeff/.babel.json'
at Error (native)
at Object.fs.openSync (evalmachine.:500:18)
at Object.fs.writeFileSync (evalmachine.:1099:15)
at process.save (/Users/jeff/Documents/TestApp/node_modules/react-native/node_modules/babel-core/lib/api/register/cache.js:35:19)
at process.emit (events.js:107:17)
at process.exit (node.js:600:17)
at process. (/Users/jeff/Documents/TestApp/node_modules/react-native/packager/packager.js:143:11)
at process.emit (events.js:107:17)
at process._fatalException (node.js:236:26) Process terminated. Press to close the window

Answer 1

I had fixed this problem, and execute the following command
sudo chmod 777 ~/.babel.json
and then re-init the react-native project, it will be successful.

Answer 2

You can try just
nvm alias default iojs-v2
If that doesn't work try going through all the steps in the installation guide again. Then in your project folder
rm -rf node_modules/
npm i
In Xcode remove RCTWebSocketDebugger from your libraries:
YourProject > Libraries > RCTWebSocketDebugger
Then in Xcode Product -> Clean and try building again

Answer 3

Giving the admin permissions to the path ~/.babel.json should help. Try with this command:
sudo chmod 777 ~/.babel.json