title: Expo project error Could not connect to development server after updating expo SDK
body: <p>I created a project a while back and tried running it recently and got an error from expo saying that my SDK version is not up to date. So I followed this answer (<a href="https://stackoverflow.com/questions/52287710/the-experience-you-requested-uses-expo-sdk-vnull-but-this-copy-of-expo-client">The experience you requested uses Expo SDK v(null), but this copy of Expo Client requires at least v23.0.0</a>) to fix it. However now I'm running into a new error where my project cannot run and I get this error:</p>
  
  <blockquote>
    <p>Could no connect to development server</p>
  </blockquote>
  
  <p>What can I do to fix this? I don't want to try a hundred different solutions and accidentally lose my project forever and have to start over, so I figured I'd ask on here.</p>
  
  <p>Here is my <code>package.json</code>:</p>
  
  <pre><code>{
    "main": "node_modules/expo/AppEntry.js",
    "scripts": {
      "start": "expo start",
      "android": "expo start --android",
      "ios": "expo start --ios",
      "eject": "expo eject"
    },
    "dependencies": {
      "axios": "^0.19.0",
      "expo": "^33.0.0",
      "firebase": "^6.5.0",
      "formik": "^1.5.8",
      "global": "^4.4.0",
      "native-base": "^2.12.1",
      "react": "16.5.0",
      "react-native": "https://github.com/expo/react-native/archive/sdk-33.0.0.tar.gz",
      "react-native-elements": "^0.18.5",
      "react-native-keyboard-aware-scroll-view": "^0.9.1",
      "react-native-modal": "^11.3.1",
      "react-native-paper": "^2.16.0",
      "react-native-smart-carousel": "^1.1.0",
      "react-native-snap-carousel": "3.6.0",
      "react-native-vector-icons": "^6.6.0",
      "react-navigation": "^3.11.0",
      "styled-components": "^4.2.0",
      "truffle": "^5.0.34",
      "uuid": "^3.3.3",
      "web3": "0.19"
    },
    "devDependencies": {
      "babel-preset-expo": "^5.0.0"
    },
    "private": true
  }
  
  </code></pre>
  
  <p>I ran <code>expo-cli --version</code> in my terminal and this is what I received:</p>
  
  <pre class="lang-sh prettyprint-override"><code>3.0.4
  </code></pre>
  
  <p>Thank you</p>