title: Can't add Heroku scheduler add-on
body: <p>In my Rails app, I have a rake task that I want to run periodically. When I try to add the Heroku scheduler add-on to my app, I get this error:</p>
  
  <p>"Could not create resource with vendor, please try again later"</p>
  
  <p>This happens both through the web interface and the console. The command I'm running in the console is:</p>
  
  <pre><code>heroku addons:add scheduler:standard
  </code></pre>
  
  <p>The add-on is completely free, but my account is verified with my payment info nonetheless. Any idea why this is happening?</p>