error in url(urltext,....,method="libcurl"):cannot open connection when to Knit wrod
<blockquote>
  <p>Error in url(urltext,...method="libcurl'): Cannot open connection Calls: ...eval->eval->randomNumbers->getConnection->url</p>
</blockquote>

<p>I am trying to knit word the Rmd file. Running some tests on Random Numbers from <a href="https://www.random.org" rel="nofollow"><code>random.org</code></a>. But I keep getting this error message, any troubleshooting suggestions?</p>