title: Why is my callback suddendly failing for angular app using Auth0 deployed on heroku?
body: <p>The authentication feature using Auth0 was working great then recently started showing, "Cannot GET /callback". </p>
  
  <p>The callback url is whitelisted in my Auth0 dashboard.
  The <code>callbackUrl</code> is also set to the correct uri, for example <code>myapp.heroku.com/callback</code> .</p>
  
  <p>What would cause this to randomly stop working? In the console I see a content security error</p>
  
  <p><code>Content Security Policy: The page’s settings blocked the loading of a resource at self (“default-src”).</code></p>
  
  <p>I suspect this could be the culprit but I’m not sure how to solve this. </p>
  
  <p>Has anybody experienced this before?</p>