Chrome Extension "Refused to load the script because it violates the following Content Security Policy directive" : <p>I'm trying to create a Chrome extension, but none of my JS works. The console shows this error:</p>

<blockquote>
  <p>Refused to load the script
  '<a href="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js">https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js</a>'
  because it violates the following Content Security Policy directive:
  "script-src 'self' blob: filesystem: chrome-extension-resource:".</p>
</blockquote>

<p>Why is it blocking my jQuery from running?</p>
