title: Facebook ads API : Object with ID '*****************' does not exist, cannot be loaded due to missing permissions
body: <p>I am working on the facebook ads API (3.2) But I am getting some weird errors. I am trying to get the <code>campaigns</code> And following is the method I am using for this according to the documentation <a href="https://github.com/facebook/facebook-php-business-sdk#cursors" rel="nofollow noreferrer">Here</a></p>
  
  <pre><code>public function getcampaigns() {
     $adaccount = new AdAccount('331*****10774');
     $campaigns = $adaccount-&gt;getCampaigns();
     print_r($campaigns);
  }
  </code></pre>
  
  <p>But I am getting the error 
  <a href="https://i.stack.imgur.com/eNcvV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eNcvV.png" alt="enter image description here"></a></p>
  
  <p>Then I try this with <a href="https://developers.facebook.com/tools/explorer/" rel="nofollow noreferrer">Explorer</a> with the same <code>access_token</code> and it worked well. 
  <a href="https://i.stack.imgur.com/qE9Uq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qE9Uq.png" alt="enter image description here"></a></p>
  
  <p>I am giving the following permissions in <code>access_token</code> </p>
  
  <pre><code>$this-&gt;permissions = ['email', 'ads_management', 'pages_show_list', 'publish_pages', 'manage_pages', 'ads_read', 'business_management'];
  </code></pre>