How can I resolve 'npm ERR! code ELIFECYCLE' in Project.js during npm start

I was following the getting started with create react native app to create my first react native application. But I am getting the following error -

npm start

2:11:42 PM: Starting packager... 

2:11:46 PM: Error starting packager:
Error: Couldn't start project. Please fix the errors and restart the
project.

at /xdl/src/Project.js:1039:11
at Generator.next (<anonymous>)
at step (/Users/xyz/my-app/node_modules/xdl/build/Project.js:1461:191)
at /Users/xyz/my-app/node_modules/xdl/build/Project.js:1461:361
at <anonymous> 
npm ERR! code ELIFECYCLE 
npm ERR! errno 1 
npm ERR! my-app@0.1.0 start: `react-native-scripts start` 
npm ERR! Exit status 1 
npm ERR! Failed at the my-app@0.1.0 start script.

The line of code this trace is referring to in the file Project.js -

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

As suggested here npm ERR! code ELIFECYCLE I've tried to do a npm run clean and delete node_modules and npm install. But that didn't help either.

via nullpointer