title: Sandbox paypal is not redirecting the user to success page
body: <ul>
  <li><p>I have sandbox paypal business account and It working fine till yesterday but as of now user able successfully pay the amount from paypal and the transaction also reflects in my account but after that its not redirected user to the website success page.Its redirected user to cancel page after some time.</p></li>
  <li><p>I got following errors in console,</p></li>
  </ul>
  
  <p><strong><em>Failed to load resource: the server responded with a status of 500 (Internal Server Error)</em></strong></p>
  
  <p><strong><em>util.js:154 Refused to send form data to '<a href="https://websitename/PayPalConfirmation" rel="noreferrer">https://websitename/PayPalConfirmation</a>' because it violates the following Content Security Policy directive: "form-action 'self' https://</em>.paypal.com https://<em>.cardinalcommerce.com".</em></strong></p>
  
  <p>Anybody can please help? </p>