Error: RNFirebase core module was not found natively on iOS : <p>I created a new app and I am trying to use <code>react-native-firebase</code>. But I continually get this error: </p>

<blockquote>
  <p>RNFirebase core module was not found natively on iOS, ensure you have
  correctly included the RNFirebase pod in your projects 'Podfile' and
  have run 'pod install'. </p>
  
  <p>See <a href="http://invertase.link/ios" rel="noreferrer">http://invertase.link/ios</a> for the ios setup guide.</p>
</blockquote>

<p>Steps that I have done: </p>

<ol>
<li><p><code>yarn add react-native-firebase</code></p></li>
<li><p><code>react-native link react-native-firebase</code></p></li>
<li>Set up my .plist file from Google under .../myproject/ios/myproject </li>
<li>Ran <code>pod update</code>after ensuring I was using Ruby 2.5.0</li>
<li>Ran pod install</li>
</ol>

<p>The pod file that I am currently using is: </p>

<pre><code># Uncomment the next line to define a global platform for your project
platform :ios, '9.0'

target 'MyProject' do
  # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
  # use_frameworks!
    pod 'Firebase/Core'
    pod 'Firebase/Database'
    pod 'Firebase/Messaging'

  target 'MyProjectTests' do
    inherit! :search_paths
    # Pods for testing
  end

end
</code></pre>

<p>These are the versions that I am using: </p>

<pre><code>"react": "^16.3.0-alpha.1",
"react-native": "0.54.2",
"react-native-firebase": "^3.3.1",
</code></pre>
