title: PayPalEnvironmentProduction and PayPalEnvironmentSandbox failed
body: <p>I am trying to use paypal iOS SDK in out app. I finished registration and create app, then i got two client ID, sandbox and live.</p>
  
  <p>When i use sandbox client ID, live client ID, i got an error.</p>
  
  <p>iOS Alert Tip:</p>
  
  <pre><code>We're Sorry. There was a problem communicating with the PayPal servers. Please tey again.
  </code></pre>
  
  <p>(I tried many times, but still failed.)</p>
  
  <p>Error Log:</p>
  
  <pre><code>PAYMENT_CREATION_ERROR - System error (PAYMENT_CREATION_ERROR). Please try again later. (422) | PayPal Debug-ID: fd805f5f6239a [live, PayPal iOS SDK 2.5.0]
  </code></pre>
  
  <p>Please help me.</p>
  
  <p>Thank you~</p>