title: Error: cordova-plugin-fcm: You have installed platform ios but file 'GoogleService-Info.plist' was not found in your Cordova project root folder
body: <p>I am beginner ionic 3. I learn the FCM from "<a href="https://devdactic.com/ionic-firebase-angularfire/" rel="nofollow noreferrer">https://devdactic.com/ionic-firebase-angularfire/</a>". Problem is when I write "ionic serve" every thing is ok. </p>
  
  <p>But when I run in simulator error "**/node_modules/firebase/utils/promise.js</p>
  
  <p>Module not found: Error: Can't resolve 'promise-polyfill'<strong>". 
  I run "**npm install promise-polyfill --save-exact</strong>" command in cli in project folder Error gone. </p>
  
  <blockquote>
    <p>A new Error appear " <strong>Error: cordova-plugin-fcm: You have installed
    platform ios but file 'GoogleService-Info.plist' was not found in your
    Cordova project root folder.</strong>"</p>
  </blockquote>
  
  <p>Someone Please give some suggestion to solve the error.</p>