title: Add the Association Domains feature to your App Id?
body: <p>I'm trying to implement Firebase Dynamic Linking.</p>
  
  <ul>
  <li>i have created project on firebase console and provided the required
  value(prefx and appid).</li>
  <li>i also have allowed the association domains from developer console
  and it is sucessfully showing true flag.</li>
  <li>in xcode i have on the feature of association domain and added the url identifiers etc. </li>
  </ul>
  
  <p>Problem: still the problem i'm facing is that Association Domain Section says
  Add the Association Domains feature to your App ID.
  don't know whats the reason why i'm getting this error.
  The screen shot is also attached for prove.
  <a href="https://i.stack.imgur.com/iUwYb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/iUwYb.png" alt="enter image description here"></a></p>