title: React Native Fetch Load Error
body: <p>I've just started working with React Native to develop mobile apps. I want to use Fetch to make GET requests for geoprocessing services on my company's server. I'm working with <a href="https://github.com/tiaanduplessis/react-native-fetch" rel="nofollow noreferrer">this</a> example and I keep getting this error in Expo: <strong>Cannot read property 'string' of undefined</strong>. I get this error even when I just import Fetch at the top of the script, without the rest of the code. </p>