React-Native Build Succeeded - Native module cannot be null (iOS)

I am running a native-react app on my local El Capitan Mac OS X machine. I am trying to get it to run in simulator for iOS.

The build is succeeding but I am seeing a red screen with the words: Native module cannot be null.

I am seeing this error in console:

NotFoundError: Cannot find entry file global code@http://localhost:8081/index.ios.js in any of the roots: ["/Users/User/f8app"]    at DependencyGraph._getAbsolutePath (/Users/User/f8app/node_modules/node-haste/lib/index.js:288:13)    at /Users/User/f8app/node_modules/node-haste/lib/index.js:226:30    at process._tickCallback (node.js:401:9)

How do I fix this? Thank you.

React-native version:react-native-cli: 1.0.0react-native: 0.28.0

EDIT: This is incredibly confusing, because index.ios.js is in the root of my project.