title: Parameter “currency” is invalid for event “Purchase”
body: <pre><code>fbq('track', 'Purchase', {
      value: 100.00,
      currency: 'MVR',
  });
  </code></pre>
  
  <p>I'm using Facebook event tracking in one of our client sites and the browser is showing below error in the Purchase event. 
  <strong>Facebook Pixel Error: Parameter "currency" is invalid for event "Purchase"</strong> But it gets logged in the Ads manager as a successful event.</p>
  
  <p>I also noticed that this error occurs only in a few currencies like <strong>LKR</strong>, <strong>MVR</strong> only. If we send currencies like <strong>USD</strong> or <strong>GBP</strong>, the browser shows no error. </p>
  
  <p>What could be the reason for this?</p>