title: Cannot view GitHub documentation
body: <p>I cannot view GitHub documentation (<a href="https://docs.github.com/*" rel="nofollow noreferrer">https://docs.github.com/*</a>) in Chrome 79.0.3945.117
  (MacOS 12.0.1): I see only a blank page.</p>
  <p>In the Chrome console, I see the following errors:</p>
  <ol>
  <li>DOMException: Failed to execute 'sendBeacon' on 'Navigator': sendBeacon() with a Blob whose type is not any of the CORS-safelisted values for the Content-Type request header is disabled temporarily. See <a href="http://crbug.com/490015" rel="nofollow noreferrer">http://crbug.com/490015</a> for details.</li>
  <li>DOMException: Failed to execute 'sendBeacon' on 'Navigator': sendBeacon() with a Blob whose type is not any of the CORS-safelisted values for the Content-Type request header is disabled temporarily. See <a href="http://crbug.com/490015" rel="nofollow noreferrer">http://crbug.com/490015</a> for details.</li>
  <li>A client-side exception has occurred, see here for more info: <a href="https://nextjs.org/docs/messages/client-side-exception-occurred" rel="nofollow noreferrer">https://nextjs.org/docs/messages/client-side-exception-occurred</a></li>
  <li>Error rendering page:  TypeError: Cannot read property 'cookies' of undefined</li>
  <li>Failed to load resource: the server responded with a status of 404 ()</li>
  </ol>