title: Amplify: Expo Could not connect to development server
body: <p>I have a React-Native app, using AWS Amplify that works with Expo when testing  using <code>expo start --web</code>, but I am trying to test on my iOS device and get a <code>Could not connect to development server.</code> Error. <code>URL: http://192.168.1.6:19000/node_modules%5Cexpo%5CAppEntry.bundle?platform=ios&amp;dev=true&amp;hot=false&amp;minify=false</code></p>
  <p>EDIT: I have tried starting a blank project, using <code>amplify pull</code>, and then this error occurs:</p>
  <pre><code>jest-haste-map: Haste module naming collision: projectamplifyjsc7fc9745PostConfirmation
    The following files share their name; please adjust your hasteImpl:
      * &lt;rootDir&gt;\amplify\#current-cloud-backend\function\projectamplifyjsc7fc9745PostConfirmation\src\package.json
      * &lt;rootDir&gt;\amplify\backend\function\projectamplifyjsc7fc9745PostConfirmation\src\package.json    
  
  Failed to construct transformer:  DuplicateError: Duplicated files or mocks. Please check the console for more info
      at setModule (C:\Users\me\Desktop\project\node_modules\jest-haste-map\build\index.js:620:17)
      at workerReply (C:\Users\me\Desktop\project\node_modules\jest-haste-map\build\index.js:691:9)
      at processTicksAndRejections (internal/process/task_queues.js:93:5)
      at async Promise.all (index 50) {
    mockPath1: 'amplify\\#current-cloud-backend\\function\\projectamplifyjsc7fc9745PostConfirmation\\src\\package.json',
    mockPath2: 'amplify\\backend\\function\\projectamplifyjsc7fc9745PostConfirmation\\src\\package.json'}
  Error: Duplicated files or mocks. Please check the console for more info
      at setModule (C:\Users\me\Desktop\project\node_modules\jest-haste-map\build\index.js:620:17)
      at workerReply (C:\Users\me\Desktop\project\node_modules\jest-haste-map\build\index.js:691:9)
      at processTicksAndRejections (internal/process/task_queues.js:93:5)
      at async Promise.all (index 50)
  Error: Duplicated files or mocks. Please check the console for more info
      at setModule (C:\Users\me\Desktop\project\node_modules\jest-haste-map\build\index.js:620:17)
      at workerReply (C:\Users\me\Desktop\project\node_modules\jest-haste-map\build\index.js:691:9)
      at processTicksAndRejections (internal/process/task_queues.js:93:5)
      at async Promise.all (index 50)
  </code></pre>
  <p>What is this and how to fix?</p>